@TP-Link 1. Yes both the Deco M4 units are turning red for a moment. Solid Red. 2. This happens every once every 15 seconds or so. I get packet losses then. On CMD, the results for "ping 8.8.8.8 -t"...

Frequent packet loss on the Deco M4. No packet loss when connected directly or connected through another router. Router LED flashes red when packet loss happens