Tremolo of two whole notes - Copy/Paste produces wrong results

(v 1.1)
Problem reproduction:
1. Create two half-notes with different pitches.
2. Drag/drop the 3-bar tremolo symbol onto the first half-note. (Results in whole note + tremolo symbol + whole note.)
3. Copy the entire measure and paste it into another measure. (Results in whole note + tremolo + half note (should be whole note).)