It doesn't hurt to update Windows regardless lol
I'm glad you were able to reproduce the issue, that will help with getting it resolved. And you are correct that it is not the entire airport. I am able to update the main gates (like Terminal A), but the smaller gates on the outskirts of the airport for the regional jets is where I've been having the issue.
It it helps any, with the AFCAD file I attached in post 1, I was able to update gates J10 and J11 but the issue started on J12. Again, those spots are with the AFCAD in post 1, not the Taxi2Gate that I am using now. Hopefully that will help see where the boundaries are for any adjustments that may be needed.