Unfortunately, no. No source-control in effect, and it's happening with a whole new project (which I created to test with).
It has worked in the past in other projects, but not my most recent one, and not in the test project I created to test the issue immediately afterward.
My drive is not full and there aren't any other ways I can think to test this. Since I've been able to reproduce this in a fresh project, I'd be willing to send it to you if necessary.
Thank you for the response and continued support, I really appreciate it.