Selecting multiple sources and applying Show or Hide transitions only affects the first source

Operating System Info

Windows 11

Other OS

No response

OBS Studio Version

Other

OBS Studio Version (Other)

30.1.0

OBS Studio Log URL

https://obsproject.com/logs/U9LMG0C7Njp7Rsdx

OBS Studio Crash Log URL

No response

Expected Behavior

Every selected source should get the show and hide transitions applied

Current Behavior

Only the first source in the list gets the show and hide transitions applied

Steps to Reproduce

1. Select multiple sources
2. Right click any of them, hit "show transition" and fade
3. the sources will still be selected. If you right click any of them now, it says "fade" when checking the show transition
4. clicking the first source will also show "fade", but the second and all the other sources will still have the old transition applied
   ...

Anything else we should know?

https://cdn.discordapp.com/attachments/374636015396192257/1222852099067613245/20240328-1016-57.4817941.mp4?ex=6617b8c3&is=660543c3&hm=b2c2b59b2ec8b188e7e8d76eb6c9bd3df9f9470737019b317d8c7f551cea63be& here's a video I sent on the discord

https://github.com/obsproject/obs-studio/assets/43674257/6c154da2-8030-446f-bd19-476acd70455e

No files or tests are named in the report. Reproduce on Windows 11 with OBS 30.1.0 by selecting multiple sources and applying a show or hide transition, then trace the multi-selection transition handling; done means every selected source has the requested transition, not only the first.