@TP-Link_Deco Thanx for the answer, here is my explanation/substantiation: I bought a Deco mesh wifi for a better wifi signal in my home. It is worse then before, the signal is not stable, multiple...

In Deco lab there is a wifi interference tool, it says that the interference is high! So i need to change the wifi channel manualy to try if this helps because my phone keeps reconnecting the deco's.