@Pesala This is a workaround, but my issue is two fold:
a) This is something that I have to do every new window I work on which is tedious and annoying, even with keyboard shortcuts
b) It reverts itself if I I do this for multiple windows.
Hypothetical example; I have Window A and Window B.
In Window A, I collapse all folders and only have Window A expanded.
In Window B, I collapse all folders and only have Window B expanded.
This works until I navigate away from the Windows Toolbar in Window A (say I download something and I go to the Download sidebar. When I come back, now in Window A, I see Window B is expanded and Window A is collapsed (the most recent adjustment made is kept, regardless of which window it was made in)