[kde] [Bug 403421] New: some QT based application don't show anything but plain color in their window

[Edward Torvalds]

https://bugs.kde.org/show_bug.cgi?id=403421

            Bug ID: 403421
           Summary: some QT based application don't show anything but
                    plain color in their window
           Product: kde
           Version: unspecified
          Platform: Manjaro
                OS: Linux
            Status: REPORTED
          Severity: critical
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: ltorvalds024 at gmail.com
  Target Milestone: ---

SUMMARY
After some time of usage, some QT based applications like qTox, qBittorrent go
completely empty, they don't show their window but a single colour. This does
not happen on first launch but after some time of usage.  
I am not a developer so please help me out if I am missing some information.
Thanks

STEPS TO REPRODUCE
1. Launch qTox, qBittorrent
2. (use for some time)
3. (window goes total blank)

OBSERVED RESULT
Application window goes blank

EXPECTED RESULT
Should see the content of window and should be able to interact.

SOFTWARE/OS VERSIONS
Windows: (no)
MacOS: (no)
Linux/KDE Plasma: Manjaro KDE edition (latest version -- updated my system
before filing the bug)
(available in About System)
KDE Plasma Version: 5.14.5
KDE Frameworks Version: 5.53.0
Qt Version: 5.12.0

ADDITIONAL INFORMATION
screen shot of About system: https://i.imgur.com/FaYs7OB.png  
screen shot of blank window of qTox: https://i.imgur.com/9IsIeAg.png  
Page of above screen shots: https://imgur.com/a/qmiTW4N  

Thanks

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