I have a setup of 4 Deco M4, now main bedroom deco is closer to bedroom deco and bedroom deco has a good signal, but main bedroom deco instead keeps connecting to living room deco and results in slow

Deco M4 does not connect to nearest deco, instead it connects to the main one which is farthest and results in slow internet speed. I have 4 Deco M4 mesh devices and each one only connects to the main