I have the same issue with my ring doorbell, it doesn't work on 5GHZ. What's odd is on 2.4GHZ it moans about weak signal when its literally like 4 meters from the main Deco. No other device reports...

Thanks for this! Finally can sort out my M9v2 network layout! It seems to be working as expected!

Totally regret buying my 4 x M9 Plus, good idea...just trash software and even worse developers. Never in my life will I ever buy anything from TP-Link. They should offer a refund on purchases, I'll...

Just to confirm the latest firmware update for the m9 plus does nothing to fix the network source issue. Guess we continue to wait for firmware 1.6.0

@TP-Link Still nothing for Deco M9? No beta or anything? What's the hold up, developers must be using Waterfall model

@TP-Link No it hasn't made a difference. The unit on the 3rd floor still connects to the main unit on the first floor. It should connect to the 2nd unit directly below it on the second floor.