More a wish than a bug, that is why I’m reporting it here instead of KDE Bucktracking System.
Sometimes, when the user is installing an app from Discover, the status bar on the top-right corner of the window changes its status from Downloading to Starting and so again until the installation is complete. With the text, the status bar automatically resizes, giving the bad impression of something glitching.
Happened while installing Authpass on KDE Linux.