Windows 10 change default window launch size (opening the command prompt)

The problem

So I have a simple problem that the internet seems to have no answers for. A few weeks ago, I was working with Visual Studio and the command prompt side by side. I slid the windows over so the command prompt only takes up the left 3" of the screen. I closed the command prompt when I was done and Windows remembered the window size. So the next time I opened it, it was still 3" wide and the full height of the screen. No problem, right? Just resize the window again and close it again. Well, Windows is being stubborn and is refusing to recognize any new window size. So I have to resize my 3" wide window every time I open it (10+ times a day)

I've looked for any trick or registry tweak to fix this, but I can't find anyone on the internet who's had the exact same problem. I'm not afraid of the registry, so if there is a key for this, let me know.

Things I've tried

I found this, this, and this, but none of them directly applied to me, and I don't feel like installing another power user program just to fix a problem that I shouldn't be having in the first place. If nothing else works, I'll just add a function to my AutoHotkey script to change the size every time a
461X1035 command window opens… :-/

I tried just about every combination of window resizing, maximizing and minimizing, etc. I rebooted and even hard shutdown the computer with the command prompt opened to a reasonable size. I rummaged through the registry but have not found any keys that seem applicable.

Note

This problem does not show up in all situations. When I open CMD with Run or Perforce (Where I usually use it), it is annoyingly small. When I run it from the Start Menu, it is a normal size. Which makes me wonder if these programs use a different shortcut/command to open it than Windows does by default.

I'm on Windows 10 Enterprise 64 bit.