Looking for thoughts on what might be causing the clock changes below,
thanks in advance.

ptp4l version 3.1

2023-07-07T16:20:11.618343+00:00 mellanox-01 ptp4l: [ptp4l.INFO]:
[16585530.162] master offset          5 s2 freq  -17044 path delay 838
2023-07-07T16:20:12.512331+00:00 mellanox-01 ptp4l[3351]:
ptp4l[16585531.057]: selected best master clock 000efe.fffe.010aac
2023-07-07T16:20:12.512670+00:00 mellanox-01 ptp4l[3351]:
ptp4l[16585531.058]: PTP [Debuggability]: PTP Grandmaster clock has changed
from 000efe.fffe.010aac to 000efe.fffe.010aac
2023-07-07T16:20:12.513066+00:00 mellanox-01 ptp4l[3351]:
ptp4l[16585531.058]: updating UTC offset to 37
2023-07-07T16:20:12.513406+00:00 mellanox-01 ptp4l: [ptp4l.NOTICE]:
[16585531.057] selected best master clock 000efe.fffe.010aac
2023-07-07T16:20:12.513723+00:00 mellanox-01 ptp4l: [ptp4l.NOTICE]:
[16585531.058] PTP [Debuggability]: PTP Grandmaster clock has changed from
000efe.fffe.010aac to 000efe.fffe.010aac
2023-07-07T16:20:12.514065+00:00 mellanox-01 ptp4l: [ptp4l.INFO]:
[16585531.058] updating UTC offset to 37
2023-07-07T16:20:12.677986+00:00 mellanox-01 ptp4l[3351]:
ptp4l[16585531.222]: master offset         29 s2 freq  -17018 path delay 838
2023-07-07T16:20:12.678344+00:00 mellanox-01 ptp4l: [ptp4l.INFO]:
[16585531.222] master offset         29 s2 freq  -17018 path delay
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