Deleting measures causes bad layout of slurs from grace notes
OS: Windows 10 (10.0), Arch.: x86_64, MuseScore version (64-bit): 184.108.40.20695, revision: 5859662
Open the attached score. Delete the 2nd system, measures 7-12 (using Ctrl + Del). Result: The slur in measure 7 loses its shape, size and position. Not restored by UNDO.