[Bug]: OBS-ndi changes scene name arbitrarily

[wpl-test]

Operating System Version

Windows11

CPU

No response

GPU

No response

NDI Devices

No response

OBS Version

29.1.3～30.0.2

OBS Installation Method

exe

OBS-NDI Version

4.12.0～4.13.0

OBS-NDI Installation Method

exe

[Extra] Installation Steps

No response

OBS Log [URL]

No response

NDI Version

5.6.0.0

Describe the bug

If scene names overlap between different scene collections, the scene names will be changed automatically.
This issue does not occur in safe mode, so after verifying it, it does not occur if "NDI Output settings" is turned off.

Steps to reproduce the problem

1. Create scene “test” in scene collection “01”
   
2. Create scene “test” in scene collection “02”
   
3. When you return to scene collection “01”, scene “test” has been changed to “test 2”.
   

If "NDI Output settings" is turned off, this problem will not occur.

Expected behavior

No response

Screenshots

No response

Additional context

No response

[BitRate27]

This is because the COLLECTION_CLEANUP event is not acted on in preview_output.cpp:
Add this case in the on_preview_scene_changed callback:
case OBS_FRONTEND_EVENT_SCENE_COLLECTION_CLEANUP:
obs_source_release(ctx->current_source);
ctx->current_source = nullptr;
break;
Because we don't release the source, the previous collection isn't cleaned up. When a new collection is selected with a duplicate scene name, it thinks there is already a scene with that name.