Created attachment 172256 [details]
Selecting only the clips on the video track

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***

SUMMARY
When having a video with audio that are normally grouped together, Kdenlive cannot keep them apart if you delete just the audio/video part and the audio/video part of one or more clips selected with Alt+Shift. And if you have two audio/video clips in a single group, i.e. one audio+video clip grouped with another audio+video clip, you can crash Kdenlive if you Alt+Shift+Select just their video clips (or audio) as well as one or more audio/video clip on the same track.

STEPS TO REPRODUCE
1. Have any video with audio cut into two or more clips on the same or different tracks
2. Select just the clips on the video tracks, not audio, using the "Alt" + "Shift" keys and press "Del" key to delete them
3. To make Kdenlive crash, join two audio/video clips together in one single group. Select just their audios/videos with Alt+Shift and another audio/video on another clip that is not part of the original group.

OBSERVED RESULT
All clips on the video track are removed, including their audio until the last selected clip, which is retained. When two audio/video clips are joint into a single a single group and you delete them independently, Kdenlive crashes.

EXPECTED RESULT
If I choose to remove only specific elements in the video track I don't expect Kdenlive to delete their corresponding audio, and I don't expect it to crash when clips are grouped together.

SOFTWARE/OS VERSIONS
Windows: 10 Pro
macOS: 
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux/KDE Plasma: 
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: