I've got 4 7982 boxes running in stand-alone bridge mode, and have been running okay, however this morning I suddenly had seemingly everyone connecting to one of the WAPs no longer get any connectivity on their Macs (which all seemed to be connected using 5G).
To be clear, a connection to the access point was established successfully, but they weren't receiving any traffic.
My old laptop I use for admin work is a 2.4G-only capable machine, and that had no problem, so presumably it was only a 5G issue.
first upgrade the AP to 220.127.116.11.15. are there other logs apart from what you posted above? you mentioned only one AP was impacted out of 4, how are the other AP's different? i mean in terms of fimware version, config, do you see those logs in those other AP's too?
if problematic AP is running on channefly or smartselect then disable it for testing and observe.
The other access points are all good. So was this one until suddenly it was not. There were no other log messages of note on the AP with the problem.
I did see the log on two other WAPs when I searched for it, but they happened very rarely. One WAP had two of those in its history, and the other had three. However when we experienced the failure, there were many such messages on that specific WAP.