@TP-Link Thank you. I just submitted issue with your instructions, including logs. Hope to hear back soon. I tried many things: 1. Restart all router units 2. Try deco.app on a different iphone/iPad...

I have 6 x M9Plus v1.x for a long time and everything worked well. A couple weeks ago I updated to firmware 1.5.0 and since then, in latest deco app (iOS 14.4) and web admin page, all connected...