The time signature 12 / 4 is creating 12 quarters in first bar, 8 in the next and 12 in the next.

• Aug 13, 2020 - 16:13
Reported version
3.4
Type
Functional
Frequency
Once
Severity
S3 - Major
Reproducibility
Randomly
Status
by design
Regression
No
Workaround
No
Project

Created a new score with time signature 12 / 4 and then the next bar had only 8 quarters.

Attachment Size
Pomeriggio_02.mscz 19.48 KB

Comments

Status active by design

You keep doing something to change the length of measures after you apply a time signature. These are not bugs in the program. The - at the top right of the short measures means that you made it shorter than the time signature and the number of beats matches the actual measure duration in measure properties.

Frequency Once Few
Status needs info by design

It would be better if you moved all discussion of this issue to a new thread in https://musescore.org/en/forum/6. This will benefit others experiencing the same problem you are. It will make it easier for them to find the discussion.