This is still an issue in 18.1.3
Are there any ideas, how to solve this kernel stuck beacon issue?
kernel ath0: stuck beacon; resetting (bmiss count 4)
kernel ath0: stuck beacon; resetting (bmiss count 4)
kernel ath0: stuck beacon; resetting (bmiss count 4)
kernel ath0: stuck beacon; resetting (bmiss count 4)
kernel ath0: stuck beacon; resetting (bmiss count 4)
kernel ath0: bb hang detected (0x4)
https://forum.opnsense.org/index.php?topic=4059.msg15229#msg15229
Yes, there are a few FreeBSD tickets where you can rattle some chains:
https://bugs.freebsd.org/bugzilla/buglist.cgi?quicksearch=stuck%20beacon
We as in OPNsense cannot fix this driver for several reasons including: difference in project focus, lack of wireless device driver expertise, general concerns over wifi stack quality in FreeBSD.
Cheers,
Franco