Created attachment 177923 [details] backtrace of main thread. I got this crash in Konsole clicking on the split-view button. This might be a qt6 bug considering that the backtrace is almost exclusively qt6. Happened on arch with QT 6.9.0beta2-1
Backtrace looks to be completely in QT code, no KDE code affected
See https://bugreports.qt.io/browse/QTBUG-129683 and https://bugs.kde.org/show_bug.cgi?id=488427 *** This bug has been marked as a duplicate of bug 488427 ***