@Ashman333 

Hi, Deco will select the best source unit to connect automatically, and there is currently no option on the Deco app to force it to connect to a certain source unit. You can try to relocate the Deco node in the bedroom and the main one, ensure the office one is physically far away from the main. And you can reboot the office node and verify whether it will connect to the bedroom node.

We do have the plan to add such a feature to force a Deco unit to connect to a certain one in the future firmware updates, please kindly wait and pay attention to the Deco app.