[Breeze] [Bug 429008] New: Some Qt applications have odd win95-looking aspect

[David]

https://bugs.kde.org/show_bug.cgi?id=429008

            Bug ID: 429008
           Summary: Some Qt applications have odd win95-looking aspect
           Product: Breeze
           Version: 5.19.5
          Platform: Fedora RPMs
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: QStyle
          Assignee: unassigned-bugs at kde.org
          Reporter: kitt997 at gmail.com
  Target Milestone: ---

Created attachment 133257
  --> https://bugs.kde.org/attachment.cgi?id=133257&action=edit
See affected apps

SUMMARY
Some Qt apps fail to show the correct breeze widget style and seem to use the
old win95 instead. I say "seem" since I'm not sure about what they actually
use.
Happens with 2 apps so far, I can't seem to find other, one of which I know is
a Qt4 app (and I think this can be related).

STEPS TO REPRODUCE
1. Open a Qt (4?) app
2. See widget style 
3. 

OBSERVED RESULT
Widget style does not match Breeze nor Qvantum. 

EXPECTED RESULT
Of course windows should all stick to the Qt widget style selected. This was
normal before upgrading to Fedora 33.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: Fedora 33
(available in About System)
KDE Plasma Version: 5.19.5
KDE Frameworks Version: 5.75 (also 5.73)
Qt Version: 5.15.1

ADDITIONAL INFORMATION
I've tried reverting to Breeze from Qvantum with no luck.
Screenshot attached for you to better understand the problem.

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