nukemaster :
Try to make it a bit larger(when near the edges of the screen, you may be snapping to the edges instead and not getting a new size). I have had Edge look like it is not saving size because i was snapping it to the top of the screen instead.
Set your preferences and try holding shift and closing the window.
I would set the folder as one process again just in case it is the issue.
Thanks for the quick response!
I generally use only my keyboard rather than the mouse, my job requires very heavy computer usage and it saves a massive amount of time (accumulatively) to not have to take my hand off my keyboard just to direct the mouse; that said, I'm pretty sure I'm not snapping the windows to any edges. Additionally, I always use alt + space, x for any windows that aren't already maximized, I only occasionally restore / resize if I have to e.g., compare 3+ folder contents simultaneously, but even then I've never resized any window to be as small as what's shown in the screen shot, you can see in the screen shot it's so small it doesn't even display the full width of the navigation pane, much less the actual folder contents.
Can you please clarify what holding shift while closing the window does? And to clarify, Alt+Shift+F4?
And launching the folders in a separate process has been a godsend to me, as before whenever explorer hangs I conversely want to hang myself because all my open folders get closed. My work process results in 15+ active windows being left open at any time, I won't get too much into detail about my work so just take my word that it's beyond a major inconvenience for me to re-navigate and open everything back up. I have 32GB of RAM installed so resources shouldn't be an issue for the setup.
Thanks again for your help and any additional details or thoughts! I realize it might not seem like a big deal, I've basically engrained to muscle memory alt + space, x, alt + v, o, down, down, enter, but you can imagine I'm slightly peeved that I have to enter that sequence so many times a day. I'm also just really curious as to the root cause, I've never encountered an issue like this before.