Sounds like the "wifi prevents sysupgrade with ath11k" problem.
You have likely not actually sysupgraded at all.
Timeout of shutting down the wifi connections prevents sysupgrade.
Until a fix (e.g. the hack proposed by @ansuel in https://github.com/openwrt/openwrt/pull/12235 ) is committed, the cure is to stop wifi (stop the "wpad" service) before sysupgrade.