In my case i have latest firmware have 2other router from tplink in similar config and connection. In any mode in some time internet stops working, then starts after maybe 5+ mins..Then depending on load (i guess) stops again within 5mins..but after 2 times works till next time...also in reapeter mode the icon shiws red cross in main network even when the internet is working..??🤔🤔

I turned off "Remote Management" and CPU processing slowed down.

Desativei o "Gerenciamento Remoto" e o processamento da CPU reduziu.