Created attachment 139598 [details] backtrace of the crash SUMMARY I was hovering over a Xwayland window in the present windows effect when the wayland session crashed. STEPS TO REPRODUCE can't reproduce it anymore. Maybe if I force soft cursors though wayland-session.log contained kwin_wayland_drm: Failed to update cursor on output "DP-3" and at least a few seconds later the crash with ASSERT: "d->m_texture" in file /home/xaver/kde/src/kwin/src/libkwineffects/kwingltexture.cpp, line 422 but that doesn't really say much more than the backtrace
*** This bug has been marked as a duplicate of bug 439134 ***