I am using a couple of Aqara Sensors and i notice this behavior happening too. But when i join them with Permit Join(All) and then manually bind to a specific router(im using Ikea Tradfri repeaters) i can get it to bind successfully. It works well with the Door Sensors, Motion sensors etc.
I only had issue with the Temp Sensor from Aqara no matter what i do, not able to bind it to specific router…
But overall it works fine for me.