Reset Base Resolution option sometimes not available in 31.0.1

Operating System Info

Windows 11

Other OS

No response

OBS Studio Version

31.0.1

OBS Studio Version (Other)

No response

OBS Studio Log URL

https://obsproject.com/logs/PXGCM4lKarpMCauq

OBS Studio Crash Log URL

No response

Expected Behavior

After update from 30.x to 31, my 16:9 Profile is completely wrecked.
When I switch between 21:9 and 16:9 in my profiles, it should show everything fullscreen.
21:9 is fine, but in 16:9 everything is much to big, slided to the left and just... wasted

Current Behavior

I am streaming in 16:9 and 21:9, so I have two different Profiles for this. I just recently updated from 30.x to 31 and it wrecked all my 16:9 screens. 21:9 is all fine, but 16:9 is all too big and tilted, like I would use my 21:9 mode and click on my 16:9 scenes...... I have hundreds of nested scenes, and I have no intention to repair them one after another... HELP!
weird thing is: In Studio-Mode everything seems to be fine, but the Preview shows it all wrong.
save mode does not help by the way, wasted there too

Steps to Reproduce

1. 30
2. 31
3. wasted
   ...

Anything else we should know?

No response

No source files or tests are named. Start by reviewing the linked OBS log and reproducing the profile switch from OBS 30 to 31 on Windows; trace why the 16:9 Preview differs from Studio Mode and why Reset Base Resolution is unavailable. Done means the 16:9 profile displays correctly without repairing nested scenes.