Folders causing visibility issues in nested subscenes with show transitions

[Mindez]

Operating System Info

Windows 10

Other OS

No response

OBS Studio Version

28.1.2

OBS Studio Version (Other)

No response

OBS Studio Log URL

https://obsproject.com/logs/xp9j6W5XqJjOFiV9

OBS Studio Crash Log URL

No response

Expected Behavior

When a Scene source is in a folder and the folder and scene both have a show transition, nested Scene sources inside the Scene source should show both during the show transition and once the transition has completed

Current Behavior

When a Scene source is in a folder and the folder and scene both have a show transition, nested Scene sources inside the Scene source only show while the show transition is occuring and then suddenly disappear

Steps to Reproduce

1. Create a new scene collection
2. Create three scenes, A, B and C.
3. In scene A, create a Display Capture Source and select a monitor
4. In scene B, create a Color Source and set the color to red
5. In scene B, create a Scene source such that Scene A (the monitor) is shown over the red color source
6. In scene C, create a Folder/Group source
7. In scene C, create a Scene source of scene B and place it in the Folder/Group source created in step 6
8. Right click on the Folder/Group source and go to Show Transition > Slide > Down
9. Right click on the Scene source for B and go to Show Transition > Slide > Down
10. Toggle the visibility off for the group
11. Restart OBS
12. Toggle the visibility on for the group
13. Observe the behaviour - The Display Capture source from scene A is displayed while the transition is happening, but once the transition finishes, it disappears and all you can see is the Red color source from scene B.

Anything else we should know?

• This only happens the first time visibility is toggled on after restarting OBS, although on my personal scene collection (not this one that I made just to demonstrate the bug), it takes exactly 4 times of toggling the group visibility to get the Display Capture source to stay visible after the transition
• This does not occur if scene A has only a Color source instead of a Display Capture source. I've not tried every type of source to see which types of sources trigger the bug and which do not.
• At some point while I was diagnosing this issue I got it into a state where the Display Capture could not be seen while transitioning (so it appeared to be a sliding red square) but then the nested scene A immediately appeared as soon as the transition finished. I've not been able to recreate this state, but that's also unexpected behaviour - while scene A is on scene B over the red color source, the red color source should never be seen.

[Mindez]

Done a bit more investigation: If you also have a hide transition, that's when it takes 4 times of toggling the visibility instead of 2 in order to get the nested subscene to 'stick'. It seems as if both show transitions (the folder/group and the scene source) are playing simultaneously and interacting in a very strange way.