S4 - Minor
Place any note in note-selection mode
While still is note-placement mode, place cursor either on or next to the note you just place
Use any of the number keys 1-9 to change your note type.
The note symbol following your cursor gets clipped by the blue outline of the first note you placed.
See also #304425: Note duration not updating unless you move
Confirmed in nightly and 3.4.2:
Workaround: Move/wiggle the mouse after changing note length.