[5.15-rc4] mt76x0u warning at net/mac80211/airtime.c:456 ieee80211_get_rate_duration.constprop.0+0xf4/0x1fc

Dear Felix, Dear Lorenzo, Dear Maintainers,

please see attached dmesg excerpt for ALFA AWUS036ACHM mt76x0u warning
at net/mac80211/airtime.c:456. It occurred during night with little wifi
traffic. The adapter serves as AP. I've also observed the AP become
unresponsive upon heavy traffic a few hours later (though without any
kernel log messages) and requiring reboot to recover. If you have ideas
how to better debug the latter, please let me know.

Thank you
Leonard