Adding new measures does not update the maximum value for position slider in Play panel
P1 - High
S3 - Major
Adding new measures using either Add Menu > Measures, or pasting measures does not update the maximum value for the position slider in the Play Panel.
Looking in the code I can see that the only time when the range of the slider is modified is when the score is changed (PlayPanel::setScore is the only place where PlayPanel::setEndPos is called). This means that as long as the current score doesn't change, the range of the slider will not change regardless of how many measures are added/deleted.
Still the case in MuseScore 3.1 RC