Created attachment 184878 [details]
Message Window

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SUMMARY
After the latest update I ran in openSUSE Tumbleweed  (snapshot 20250909). The message window in Kmail only shows a blank space. Text and symbols and links cannot be seen, however, if I hover the mouse it changes when you ove a text or link. 

STEPS TO REPRODUCE
1. Open Kontact.
2. Select Kmail.
3. Select any message.

OBSERVED RESULT
The message window does not show anything. 

EXPECTED RESULT
Be able to read the content of the respective message selected. 

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux/KDE Plasma: openSUSE Tumbleweed
KDE Plasma Version: 6.4.4
KDE Frameworks Version: 6.17
Qt Version: 6.9.2

ADDITIONAL INFORMATION