Why is this externally-created mlt file behaving weirdly in Shotcut?

I created an mlt file using melt (and then manually edited some parts of the xml to make it work with Shotcut). Then I opened up the file in Shotcut, and noticed that the bottom track had some weird behaviour when I tried to move it around. I deleted all the tracks that seem to be working normally and saved the project, in order to have a minimal example.

Does anyone know why it’s doing that?

weird.mlt (1.3 KB)

My advice would be to make the same project example from scratch in Shotcut and then compare the project file with your hand-made project file. I would expect there to be multiple differences that you would have to reconcile.

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