Articulations are duplicated on adding linked staves, crash is possible
1) Create a new score.
2) Add a note, put a fermata to this note.
3) Go to Instruments dialog, add a linked staff.
First result: the first staff now has two fermatas.
1) Go to instruments dialog again (with this score or recreated from scratch with steps 1-2).
2) Add some more number of linked staves (say, 3 should be enough).