I will describe the behavior/how I reproduce it, as I do not know if there is a name for this 'feature' or if it is intentional in the first place and search has failed me.
- Open window 1 and drag to left side of monitor to create half screen window
- Click blank desktop space to close the window selection popup
- Open window 2 and drag to the right side of monitor to create half screen window
- Open window 3 and drag to either side to create half screen window
- Click uncovered window opposite window 3
- Window 3 goes to the background (not minimized) and whatever window was behind it is displayed in foreground
This happens with windows on both left and right, and across multiple apps.
How can I disable this behavior entirely, or at least 'unlink' windows when they get grouped like this?