Bug 427517

Summary: Application Launcher entries invisible after switching back and forth quickly
Product: [Plasma] plasmashell Reporter: Nachiappan <rnachiappan123>
Component: Application Launcher (Kickoff) widgetAssignee: David Edmundson <kde>
Status: RESOLVED DUPLICATE    
Severity: minor CC: herzenschein, nate, plasma-bugs
Priority: NOR    
Version: 5.19.5   
Target Milestone: 1.0   
Platform: Arch Linux   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:
Attachments: Screen recording showcasing the glitch

Description Nachiappan 2020-10-10 14:46:10 UTC
Created attachment 132263 [details]
Screen recording showcasing the glitch

SUMMARY
Application Launcher entries become invisible if you switch back and forth quickly between menus and their sub-menus, before the switching animation completes. (see attached video)

STEPS TO REPRODUCE
1. Open "Application Launcher".
2. Go to "Applications".
3. Enter into a sub-menu. (eg. "Games")
4. Immediately go back using the arrow keys. (before the switching animation finishes)

OBSERVED RESULT
All entries in the "Applications" menu become more and more transparent, until they become very difficult to see.

EXPECTED RESULT
All entries in the "Applications" menu remain visible.

SOFTWARE/OS VERSIONS 
Linux: 5.8.5-arch1-1 
KDE Plasma Version: 5.19.5
KDE Frameworks Version: 5.73.0
Qt Version: 5.15.0

ADDITIONAL INFORMATION
Issue persists with compositor turned off. (the switching animation is still displayed, even with the compositor turned off)
Issue persists on a new user with default config.
A plasmashell restart is required to revert back to normal.
The "Application Launcher" is still functional.
First came across this glitch in Plasma version 5.19.3?
Comment 1 Thiago Sueto 2020-10-10 15:17:29 UTC
Reproducible on current master (2020-10-09 daily build) too.
Comment 2 Nate Graham 2020-10-12 18:37:21 UTC
Can reproduce in the same way. The list gets stuck in a partially-opaque state.
Comment 3 Nachiappan 2020-10-24 17:54:40 UTC
Looks like this is a duplicate of https://bugs.kde.org/show_bug.cgi?id=426329
Comment 4 Nachiappan 2020-10-24 18:04:30 UTC

*** This bug has been marked as a duplicate of bug 426329 ***