Cannot see 8th note ledger lines
The bug: when you create repeating 8th notes with ledger lines, you can not see the ledger lines unless you stretch the measure more that its default stretch.
1. Create a new score
2. Create a bunch of 8th notes alternating between middle C and the A below on the treble clef.
3. You will not see ledger lines on the C's unless you stretch the measure. Zoom in as much as you want but they will not be there.
Also, see the attached screenshot.