Deco is a terrible router
Honestly, the worst router I've ever owned.
This thing disconnects at the drop of a hat. I've had to delete and recreate the wifi network almost 12 times since owning it because if the little light turns red, it won't just reconnect to the existing network, and the only fix I've found is to delete and reconnect.
And when I told TP link support that they should allow an alternate way to set up the wifi network instead of having to use the app, they treated me like an idiot.
I've never had so many issues with a router. Unfortunately it was a gift and I don't have a receipt or I'd be returning it ASAP.