i got a strange behaviour with latest kdenlive 20.12.2 (64 bit appimage for ubuntu 20.04)

Every time i start a project using a jpg (and than some mp4 clips) resulted exported clip is audio only (no pictures).

trying to enable/disable effects and to enable/disable tracks ... always the same ....

you are right, just openen an issue about this: https://invent.kde.org/multimedia/kdenlive/-/issues/968