Bug 434893

SUMMARY
Oftentimes, when I am playing files from JuK's main window and press 'next', it will not play the next file in line, but will skip many positions (usually skip 2 and then play the next one the first time it happens, then skip more seemingly at random next times).

STEPS TO REPRODUCE (unsure)
1. Have many files and folders under ~/Music.
2. Open JuK.
3. Double click some file in there to start playing it.
4. After a few files have played, press "next", either in JuK or in the media player widget.

OBSERVED RESULT
Oftentimes (but not always) skips a couple files in the list. The amount of files it skips seems to be related to the position in the list of the file that was next to play. In the worst situations, it starts playing each file in line for what looks like a few miliseconds  at most, switching to the next one instantly without stopping to fully play any of them.

EXPECTED RESULT
Should play the next file in line.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 5.20.5
KDE Frameworks Version: 5.78.0
Qt Version: 5.15.2

ADDITIONAL INFORMATION