..and in case timestamps may give a bit more clue, here is example from one of the accesspoints:
# grep -F ieee80211_encap /var/log/messages 2021-05-09T11:35:31.155Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T11:36:07.957Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T11:36:07.964Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:14:34.117Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:14:34.567Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:14:37.467Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:14:44.217Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:14:49.267Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 2 2021-05-09T19:14:50.317Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 2 2021-05-09T19:14:51.317Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 2 2021-05-09T19:14:53.317Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 2 2021-05-09T19:14:57.318Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 2 2021-05-09T19:16:06.170Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:16:06.620Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:16:06.720Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:16:07.423Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:16:07.425Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:16:08.620Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:16:08.920Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:16:08.922Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:16:10.570Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:16:11.870Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:16:11.872Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:16:15.473Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:16:15.770Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:16:16.020Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:16:16.620Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:16:17.670Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:16:17.770Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:16:17.772Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:16:19.870Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:16:21.820Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:16:22.320Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:16:24.520Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:16:29.521Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:16:31.871Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:16:33.221Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:16:50.671Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:18:14.074Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:18:14.674Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:18:16.424Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:18:19.874Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:18:26.225Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:18:26.774Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:18:40.575Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:08.226Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:13.826Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:14.026Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:14.231Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:14.676Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:15.576Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:15.626Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:16.276Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:17.326Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:17.876Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:19.426Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:19.976Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:20.626Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:20.776Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:21.076Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:21.326Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:23.676Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:23.876Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:23.926Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:24.126Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:24.576Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:25.526Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:27.377Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:27.580Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 2 2021-05-09T19:19:28.026Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:29.527Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:31.027Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:38.327Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:40.277Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:40.380Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:41.827Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 2 2021-05-09T19:19:43.077Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:43.528Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:44.727Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:44.732Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:47.177Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:48.077Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:52.427Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:53.131Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:53.630Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:53.877Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:54.127Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:54.627Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:55.527Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:19:57.377Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:20:01.078Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:20:01.233Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:20:02.128Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:20:05.078Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:20:05.981Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:20:08.478Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:20:09.478Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:20:21.584Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:20:22.328Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:20:23.328Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:28:28.754Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:28:31.054Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:28:35.954Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:28:45.157Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 2 2021-05-09T19:28:50.455Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 2 2021-05-09T19:28:55.055Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 2 2021-05-09T19:29:03.605Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:29:25.256Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:29:29.956Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:29:32.361Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:29:43.057Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:29:45.407Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:29:45.412Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:29:54.612Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:29:55.457Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:30:13.308Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:30:25.658Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:30:27.958Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:30:31.908Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:57:49.522Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 2 2021-05-09T19:58:47.874Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:58:50.125Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 2021-05-09T19:58:53.629Z pce-0041 /bsd: ieee80211_encap: data frame for node c0:ee:fb:33:f0:11 in state 4 -- Regards, Mikolaj
