Hello!
I have a problem with my AX20 router. It used to work fine, but recently internet connection started to be very unstable.
I get connection timeout every now and then. speedtest.net, for example, can't even start a test.
My desktop PC, that is connected with a cable to the same LTE modem, has very fast and stable connection.
At first I thought this is related to WiFi, but later I connected my laptop to AX20 using cable and connection was as bad as it was with WiFi.
I tried to upgrade firmware, but router itself cannot even get firmware from TP-Link servers and fails with timeout error.

Can I do something, or I should go to warranty center and need to fix or replace it?
P.S. I already did factory reset, but it changed nothing.