The following simply works:
- Start a project
- Add a track to the timeline.
- Open an image file.
- Drag and drop from the source tab of the player to the timeline.
- Apply a Brightness filter to Track 1.
- Save. Close Shotcut.
- Open the saved mlt file.
- Remove the Track 1 filter.
- Undo.
Filter icon reappears as expected.
But this doesn’t work:
- After step 8) above, apply a Brightness filter to the clip on the Track 1.
- Undo twice.
Expected result is that the icon reappears. The result on my end is that the icon doesn’t reappear. The track filter is there and shows up if one clicks on the track.