@techiedoc I hope that you have resolved the issue by now. But for someone who stumbles on this issue, for me, it was the power brick. I used a third-party Power adapter with the same configuration, and it seems to resolve the issue for me.

 i tried all 3 as main deco it will come green occasionally but most of the time its red @David-TP 

let me try this,I will update here @Aby119 

  @techiedoc for a quick test try to swap the wall adapter with the one that works fine

  @Aby119 sadly it didnt fix my issue,I suspect there is something to change in the main modem

Having The same problem with the x50 poe (3 units in ap mode) tplink poe switch and a tplink dsl router

about once or twice a day i get red lights on all 3 even though the router is still connected to the internet stable

Any ideas anyone? ive tried changing the main deco but still keeps happening

is there any possibillity of a dhcp clash in ap mode with the main router?

  @benjamin24 No idea.When I changed adapter to a vigi camera one it fixed my issue for few weeks now again I have the same issue