We had something similar happening with our Unifi APs: the ISP connectivity dropped but WiFi just fine for ~3 to 10min. And then everything was cool again for the day. Thought it was the ISP at first because of the regularity and because the network stayed up. After some troubleshooting we figured out that the controller was the issue. In our case, the software was out of date and we had it hosted on a remote machine (free tech support requires compromises), but keeping it updated and on site has resolved the issue.
We still have a hiccup on occasion, but it is not nearly as consistent and a ~monthly AP reboot cycle sorts it out. We will likely just automate the reboot cycle. Good luck! -- Visit this forum on the web at http://discuss.coworking.com --- You received this message because you are subscribed to the Google Groups "Coworking" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.

