MS gets confused when changing note length

• Nov 3, 2019 - 12:27
Reported version
3.3
Type
Functional
Frequency
Once
Severity
S3 - Major
Reproducibility
Always
Status
active
Regression
No
Workaround
No
Project

In attached score there is a problem when I try to change the length of a note. In an earlier session I copied/pasted/removed some weird measures (resulting from midi input). Now, when I try to change a note from 1/4 to 3/8, some of these measures appear again in strange places.
When I then undo, and lower the note by a half tone using the arrow-down key, and then again try to lengthen it, all goes well.

I made a movie of this, but it is too large to upload. I hope my description is sufficient to reproduce the problem. (For me it is reproducible, also after saving and reloading the score.) The note in question is the A quarter note on the lower piano staff in measure 24, second beat. I change the length by pressing the "." on the toolbar.

Score attached.

Attachment Size
Different_Backgrounds.mscz 39.68 KB