I have a Deco X90 set, and since a week ago, the devices connected to the Deco Main, lose the internet connection and the speed performance drops noticeably.

By disconnecting and removing the other Deco from the network, the performance is optimal again and the Network is stabilized. To rule out a Hardware problem, I inverted the Decos, eliminated the network, creating a new one, where the deco that previously it had as a satellite it became the main deco, and the error is replicated, that is, by having the 2 connected, the speed and connectivity in the main deco declines or is lost.

Someone is experiencing something similar, as I mentioned before, this has been happening for a week, previously the equipment worked without any problem.