1. add color clip
2. add title clip
3. add transform effect to title clip
4. save preset
5. add new title clip
6. add transform effect, apply preset (4)
7. crash and restart application
8. and how to delete preset? when choosing preset kdenlive always crash

I confirm that this is a bug and have reported it here: https://bugs.kde.org/show_bug.cgi?id=380245

ujang, here is a guide for submiting bugs if you like to have a look in case needed for future reports: https://kdenlive.org/bug-reports/