Navigation fails in parts and continuous view when a mmrest is located to the end of the score

2.1 version / Windows7

1) From "Untitled" score, keep 16 measures, with quarter notes in the first 12 measures.
2) Generate parts (New all -> Ok)

• the test file at this step: mm navigate.mscz

3) View Part
4) Toggle in Continuous View
5) Press "End" key

Result: the score jumps strongly to the right while the blue rectangle of the navigator displays the beginning of the score (ie the two measures shown)

-By disable mmrest in part, no more issue.

-First reported in https://musescore.org/en/node/260891

• Result image