Windows all move to my main screen once I click out of Nuendo

I don’t know what happened, but it used to work fine and the windows would stay on their monitor screens. Now if I click out of Nuendo over to Zoom, or Source Connect, the video player will move to my main screen. So will the export window ect…

I am often sharing my screen with clients and use multiple applications. Not I have to move all my windows (mainly Video player) where I want them all the time.

I am not sure what changed but I need to get proper window management back.

Anyone know what is going on?

Mac Pro 2019
OS - 10.15.7 (Catalina)

Another symptom of what changed is…
when the video player is on one screen and I click “Full Screen” it jumps over to my main screen and goes full screen. Before It would fill the screen of whatever screen it was on.

Sorry I’ve figured it out. Thought I would post the reply here for anyone who has the same issues.

Right click on Nuendo in the tool bar and click “All Desktops”
I had somehow changed it to “desktop 1”