They send me "beta" firmware - same version, different rel number and date from 04.2020. And what? Nothing has changed. Router restarted wifi few times and at the end of the day whole router...

Guys, I know this sounds stupid, but try disabling NTP & set date to few months ago. I'm testing something...

Tested with cloud, without cloud, changing firewall parameters, disabling ALG na UPnP - nothing helps. It definetly must be bug in software and some overflow.

Another question: are you logged in to tplink cloud?

@Kevin_Z 1) All led's go down and up again like in restart from administration area. 2) Network layout here is simple - router connected to ISP modem that provide WAN area directly from fiber to...

@swuggmaister So the USB is not source of the problem. This need to be investigated by tplink - of course I can send back on warrenty, but this is not looking like hardware problem. For many people...