Cannot change instruments from Percussion to Timpani or Mallet Percussion instruments.

1) You create a "Percussion" stave, to write some unpitched percussion parts. (Notes or not is irrelevant)
2) Switch to a pitched part (Snare Drum, Timpani in the attached example).
3) Try writing notes in the pitched portion of the stave.

(An aside) If the cursor is set to a notehead type not used anywhere but the percussion stave, are selected in said input mode then moved to the the regular standard stave, if input is attempted, crashing can occur.

This is a problem because this is a huge standard practice in percussion book writing particularly in marching, orchestra, band, and musical books.

And yes I could make more staves, but that's not neat, or standard practice which is what Musescore standard should be, to be a powerhouse that can keep up with the ever-changing standards of the music writing industry.

As such I hope this is addressed soon.
BBJ