Dragging a window to another Desktop no longer working?

[antmit]

Hi

I have a 2018 MBP connected to two 32in BenQ monitors, on Big Sur 11.5 Beta (20G5023d).

All of a sudden (though I don't know when the last time I used the feature), I'm unable to click on a window and drag it, so that the mouse reaches the edge of the screen and moves it to another desktop on that monitor. I definitely have done this since building this monitor setup, but no matter what I do now, the only way I can move a window to another desktop is to 3-finger-drag-up on my Magic Trackpad, and move it manually into the little rectangle at the top denoting the other space.

Is this just me? Am I suddenly doing it wrong, or am unaware of a setting?

Thanks
Ant

 

[Tagbert]

that is a basic feature of Mac OS and is working fine on 11.4. Perhaps the 11.5 beta broke something?
Alternately, perhaps your windows are not arranged quite right and you are hitting the walls between the monitors instead of the open path between them? I know if monitors are not arranged in Displays, you cannot move the cursor between them. I have sometimes had Mac OS rearrange them automatically, particularly if I turned on sidecar.