Glad to know I'm not the only one still facing this issue (and on AC27)
Cuba - does switching between Fit to frame and Manually resized frame
fix the issue for you?
I had it happen on a teamwork file just now, saved it as solo project,
open and repair, problem fixed, but the 3D views resolution gets changed
(and I have to resize them again) I have a feeling it's to do with
different computer's monitors' resoluti...