@TP-Link_Deco Unfortunately we have the same issue; we have 3 Deco M5's in a 3 floor office. Main Deco is at the ground floor, second one is at 1st floor, vertically right above the main one and the 3rd one is at the 2nd floor with the same alignement. But 3rd Deco is connecting to main deco which is impossible to accept as the best speed/connection quality! There should be an option to choose whether to connect or you have to optimize the app when we choose 3+ floor design while adding decos and they should connect each other floor by floor, not to main one. It is only acceptable with single floor area to connect directly to main deco. We are having huge internet speed loss at the 3rd deco by %75! Waiting for an urgent solution please.

Same issue.  I have a roku that does not move. It has changed its connection to a further away deco m5 with very weak signal. The only way I can get it to switch back is unplug that deco.    Why would it switch to a weaker signal?   I cannot find a soultion in the android app.