Same here, Completely a mess after the update, mostly with the new AX devices. The old HAPAC2 have not been affected. By luck? i dont know…
The strange thing here is that despite i tried to allocate a static IP to the AP from the RB4011 router, this was not possible with the first 2-3 trials… anyway now seems ok but you never know after a reboot…
Eventually, it seems that in these 2 HAPAX2 that the problem occurred, i had not set admin MAC address like the other devices. I do not know what does it mean but i set them. Hope that helps me. Until now the static IP survives the reboot.