I have not seen the issue occur after the mt76 update. I am currently running
OpenWrt 22.03-SNAPSHOT r19482-2b8021d614 / LuCI openwrt-22.03 branch git-22.167.28394-8a4486a
I also did not see this issue with
OpenWrt 22.03-SNAPSHOT r19455-f608779f92 / LuCI openwrt-22.03 branch git-22.167.28394-8a4486a
and
OpenWrt SNAPSHOT r19873-a703f9ed0b / LuCI Master git-22.167.28356-8effea5
However one time (not sure which OpenWrt version I was running at that time), I thought the issue occurred again but it turned out to be due to something else.
Websites couldn't load while I was still connected to WiFi in my PIxel 6, but I was able to log into my RT3200 router from my phone (which means I was not disconnected from WiFi) using the local IPv4 address.
It turned out to be some issue with "Private DNS" (DNS over TLS) feature in my Pixel 6 (Android 12, Build SQ3A.220605.009.B1). I have disabled "Private DNS" in my phone for now and there have been no issues since then.
My /etc/config/wireless is still same as at 802.11r Fast Transition how to understand that FT works? - #105 by ka2107 (I only changed option he_bss_color from '128' to '8' when moving from MASTER-SNAPSHOT to 22.03-SNAPSHOT).