1.1 score gets corrupted in current master

Spin off from #271283: can't open score created with earlier development build and #106831: The git version of mscore (mscore-2.1.0 unstable) has problems with some score (page 1 page 2 are invisible!) as being unrelated to either.
This is about a 1.1 score (attached) that opens and looks fine in 1.3 as well as 2.2.1, but gets reported as corrupt in current master(a819eb6):

Measure 3, staff 1, voice 2 too long. Expected: 4/4; Found: 17/16
Measure 4, staff 1, voice 2 too long. Expected: 4/4; Found: 17/16
Measure 5, staff 1, voice 2 too long. Expected: 4/4; Found: 17/16
Measure 6, staff 1, voice 2 too long. Expected: 4/4; Found: 17/16
Measure 7, staff 1, voice 2 too long. Expected: 4/4; Found: 18/16
Measure 8, staff 1, voice 2 too long. Expected: 4/4; Found: 17/16
Measure 9, staff 1, voice 2 too long. Expected: 4/4; Found: 17/16
Measure 9, staff 2, voice 2 too long. Expected: 4/4; Found: 17/16
Measure 10, staff 1, voice 2 too long. Expected: 4/4; Found: 20/16
Measure 10, staff 2, voice 2 too long. Expected: 4/4; Found: 17/16
Measure 11, staff 1, voice 2 too long. Expected: 4/4; Found: 18/16
Measure 11, staff 2, voice 2 too long. Expected: 4/4; Found: 17/16
Measure 12, staff 1, voice 2 too long. Expected: 4/4; Found: 17/16
Measure 12, staff 2, voice 2 too long. Expected: 4/4; Found: 10/8
Measure 13, staff 1, voice 2 too long. Expected: 4/4; Found: 20/16
Measure 13, staff 2, voice 2 too long. Expected: 4/4; Found: 17/16
Measure 14, staff 1, voice 2 too long. Expected: 4/4; Found: 20/16
Measure 14, staff 2, voice 2 too long. Expected: 4/4; Found: 20/16
Measure 15, staff 1, voice 2 too long. Expected: 4/4; Found: 10/8
Measure 15, staff 2, voice 2 too long. Expected: 4/4; Found: 17/16
Measure 16, staff 1, voice 2 too long. Expected: 4/4; Found: 20/16
Measure 16, staff 2, voice 2 too long. Expected: 4/4; Found: 18/16
Measure 17, staff 1, voice 2 too long. Expected: 4/4; Found: 17/16
Measure 17, staff 2, voice 2 too long. Expected: 4/4; Found: 18/16
Measure 18, staff 1, voice 2 too long. Expected: 4/4; Found: 18/16
Measure 19, staff 1, voice 2 too long. Expected: 4/4; Found: 18/16
Measure 19, staff 2, voice 2 too long. Expected: 4/4; Found: 17/16
Measure 20, staff 1, voice 2 too long. Expected: 4/4; Found: 5/4
Measure 20, staff 2, voice 2 too long. Expected: 4/4; Found: 17/16
Measure 21, staff 1, voice 2 too long. Expected: 4/4; Found: 17/16
Measure 21, staff 2, voice 2 too long. Expected: 4/4; Found: 10/8
Measure 22, staff 1, voice 2 too long. Expected: 4/4; Found: 17/16
Measure 22, staff 2, voice 2 too long. Expected: 4/4; Found: 10/8
Measure 23, staff 1, voice 2 too long. Expected: 4/4; Found: 17/16
Measure 23, staff 2, voice 2 too long. Expected: 4/4; Found: 10/8
Measure 24, staff 1, voice 2 too long. Expected: 4/4; Found: 20/16
Measure 24, staff 2, voice 2 too long. Expected: 4/4; Found: 17/16
Measure 25, staff 1, voice 2 too long. Expected: 4/4; Found: 5/4
Measure 25, staff 2, voice 2 too long. Expected: 4/4; Found: 18/16
Measure 26, staff 1, voice 2 too long. Expected: 4/4; Found: 17/16
Measure 26, staff 2, voice 2 too long. Expected: 4/4; Found: 17/16
Measure 27, staff 1, voice 2 too long. Expected: 4/4; Found: 17/16
Measure 27, staff 2, voice 2 too long. Expected: 4/4; Found: 20/16
Measure 28, staff 1, voice 2 too long. Expected: 4/4; Found: 20/16
Measure 28, staff 2, voice 2 too long. Expected: 4/4; Found: 5/4
Measure 29, staff 1, voice 2 too long. Expected: 4/4; Found: 2/1
Measure 29, staff 2, voice 2 too long. Expected: 4/4; Found: 2/1

Ignoring those it then loads it. It seems to move the 1st voice 1 16th in those measures to the end, compare how it looks in 2.2.1 (and 1.3 too):

vs. master: