Looking for another issue, i built 23.05.5 with some kernel debugging enabled, and discovered kernel warnings were being logged when booting the router and restarting 5ghz.
Im poking posts which indicate 5ghz wifi fails with mediatek devices, as this seems to be a persistent issue. My router is a netgear R6700v2 with mediatek 7615E wifi.
The core problem is apparently indicated when kernel lock debugging is enabled, where a piece of code is walking a list of devices to lock each, and finds some already locked.
Users are not seeing any log messages as this checking and kernel debug code are disabled in the release openwrt.
It is possible this list is being misused or outright stomped upon. I'm trying to think of ways to debug it but that area of code is new to me.