Defaulting a Teams call to another monitor

Hello all,

I have four computer monitors; and one of them is my dedicated to my Teams app (which is not the monitor I have designated as the main one.) Until very recently, my Teams incoming and outgoing calls window would default to my main monitor.  About a week ago, I upgraded my main monitor to a new one and now I have lost that functionality: the calls window now pops up where my Teams is at and I have to be dragging it over to my main monitor.  I have not been able to figure out how to get it back to how it used to be.  Can you provide any help or info?