Unfortunately upstream closed it due to no activity. Please reopen
https://bugs.kde.org/show_bug.cgi?id=452065 so they can help resolve the
issue.
** No longer affects: kubuntu-meta (Ubuntu)
** No longer affects: plasma-desktop (Ubuntu)
** Bug watch added: KDE Bug Tracking System #452065
apport information
** Tags added: apport-collected
** Description changed:
SUMMARY
When I toggle Window Overview, the background appears to turn white, along
with the profile picture in Kickoff, and the lockscreen.
Bug is reported on KDE's bugtracker (452065)