OK, thanks, that's clear now. By the way, I think it's not a good idea to provide localized firmware versions (US, EU, etc) only for wireless channels selection. The old universal firmware versions...

tplink wrote And we also made a beta firmware with the patch. Please download and install it on your Archer C7 V2 from the link that Doom shares:...

Hi, If a hard reset with the back button can't solve your problem, I suggest you to open a ticket to the TP-Link support. This is probably a firmware bug or a hardware malfunction.