Bug 471171

Summary: Weird rendering on atleast two sites I'v come across
Product: [Applications] Falkon Reporter: Gneno <h3ll0ever1one>
Component: generalAssignee: David Rosca <nowrep>
Status: CONFIRMED ---    
Severity: minor    
Priority: NOR    
Version First Reported In: 23.04.2   
Target Milestone: ---   
Platform: Flatpak   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Gneno 2023-06-17 20:30:14 UTC 
SUMMARY
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STEPS TO REPRODUCE
1.  Visiting "Create new webmail account"
2. Visit a steamcommunity with an animated frame
3. 

OBSERVED RESULT

Once you enter Vivaldi webmail's "create account" page, you can see very odd graphical errors.
--
If you visit an users Steamcommunity profile page, and the user has animated Frame around the avatar, it keeps flickering/rendering out and in

EXPECTED RESULT
That Falkon renders webpages properly

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: Linux 5.19.0-45-generic -- elementary OS 7 Horus
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 5.15.13

ADDITIONAL INFORMATION
I hope I managed to fill the bug-report correctly, as I've never done this before.