Splitting irregular measures produce extra rests
1. create new score
2. select a measure and change actual duration to large number (like 15/4)
3. Enter various length notes to fill the measure
4. select a note and split measure before current note
result 1: second half of measure has rests randomly inserted into the measure
result 2: measure is reported as corrupted (with shorter duration) when score is saved and reopened.
See attached score for another example