https://bugs.kde.org/show_bug.cgi?id=489678

            Bug ID: 489678
           Summary: Telegram fails to redraw damaged screen regions
    Classification: Plasma
           Product: kwin
           Version: 5.27.11
          Platform: Debian testing
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: wayland-generic
          Assignee: kwin-bugs-n...@kde.org
          Reporter: ky...@yandex.ru
  Target Milestone: ---

SUMMARY

Latest Telegram desktop client (5.2+) doesn't update damaged screen regions on
kwin-wayland. The bug was reported to Telegram developers and their reply was:

This means your compositor has a bugged implementation of damage tracking with
fractional scaling. I don't think disabling fractional scaling support or
partial damage support just because old distros have bugs is a good idea so I
think you should either switch to a distro with latest Plasma or report the bug
to kwin package via your distro bugtracker.

https://github.com/telegramdesktop/tdesktop/issues/28113#issuecomment-2203232661

STEPS TO REPRODUCE
1.  Run latest Telegram desktop in Wayland session.
2.  Scroll a chat or open any menu.

OBSERVED RESULT

Parts of Telegram window are not updated.

EXPECTED RESULT

Program window should be updated according to user interaction.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma:
KDE Plasma Version: 5.27.11
KDE Frameworks Version: 5.115.0
Qt Version: 5.15.13

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