Thanks, I reproduced it now and fixed it for the next release 24.08.
Here are some tips in case you did not know:
- It is playing because you double-clicked a playlist item, but it seems all that you really wanted to do is select things. Do not double-click to select. Double-click in nearly every UI does select plus something else (usually open).
- You do not need to drag the clips into playlist first, you can drag directly to the timeline.
- You do not need to manually add a video track to an empty timeline; one is added automatically when you try to add to an empty timeline and then you don’t need to worry about blank space at the beginning of the track.