AC66U crashes and reboots itself when Android phone connects to its Wifi

I've got a new phone (HTC U12 +) and ran into a very strange problem - very often (not always, more likely after wifi module on the phone goes off and then back on) when connecting the phone to the AC66U network, on both ranges, it does not matter 5 or 2.4 GHz, router goes into reboot. Never seen such behavior, although several years a huge number of home devices work with this router, uptime has always been from firmware to firmware, the stability of the work is iron. And now it's like a...

AC66U crashes and reboots itself when Android phone connects to its Wifi