https://bugs.kde.org/show_bug.cgi?id=433527
--- Comment #7 from Martin Lang <mlg.hessigh...@gmail.com> --- I tried several things and I think I found, what makes the difference: New project, added 3 GoPro clips, each clip contains video and audio track. Added two clips to timeline, switched picture preview in the Timeline-Menu off, and dragged end of first clip a little bit to the left and beginning of second clip a bit the right (yust to get some space for the in track transition) Now 3 different sceanarios Scenario 1) - Added a transition by double clicking - Moved first clip to a different track Transition got removed, everthing fine Scenario 2) - As 1) but grouped both tracks - moved the group around - ungrouped again - moved first clip to different track Transition got removed, everything fine Note, both scenarios had video and audio track. Scenario 3) - Selected first clip - ungrouped video and audio track - deleted audio track from timelin - ungrouped second clip and removed audio track - added transition between the remaining video track - moved first video clip to another track - then you get the screenshot that is already attached - clicking on the transition produces the crash So the difference is the audio track Made another check: - Recreated the audio track again (from context menu option) Everything works again -- You are receiving this mail because: You are watching all bug changes.