Using click and drag + copy and paste breaks rhythmic division in subsequent bars

[buryoutougen]

Example to reproduce:

• create a new tab with 2 bars
• put a quarter note in the first bar and a whole note in the second bar
• select the quarter note and copy it
• paste it somewhere in the first bar

The whole note in the second bar changes into a quarter note tied to a dotted half note. It seems to affect both notes and rests in all subsequent bars, by the way.