Created attachment 160213 [details]
Screenshot of Preview Pane Frozen

SUMMARY
When using the Kontact flatpak from flathub, unpredictably, when switching from viewing one e-mail to the next, switching inboxes, or deleting e-mails, either akonadi or kmail (within Kontact) just goes "zombie" for lack of a better way to describe it.    The UI just stops responding, and requires running a `flatpak kill org.kde.kontact` and then restarting the flatpak, to resume functionality


STEPS TO REPRODUCE
1. Start kontact via `flatpak run org.kde.kontact`
2. Read e-mails or otherwise interact with them, deleting e-mails seems to cause the issue most often

OBSERVED RESULT
GUI stops loading e-mail content or fetching mails.  (Please see attached screenshot)

EXPECTED RESULT
Content of selected e-mail loads in the preview pane, and e-mail fetching continues to happen as scheduled

SOFTWARE/OS VERSIONS
Linux/KDE Plasma:  openSUSE Kalpa 20230706 Linux Kernel 6.3.9-1-default (64-bit)
KDE Plasma Version: 5.27.6
KDE Frameworks Version: 5.107.0
Qt Version: 5.15.10

ADDITIONAL INFORMATION
Attachments are shown after letting Kontact run for appx 12 hours after issue was encountered.    I'm typically having to restart Kontact multiple times per day.