There is an issue in cubase 10.5 where copying midi data in lanes is broken. Dragging to copy causes other lane data to be deleted. It was working fine in cubase 10.
Do I understand you right:
- Create MIDI Track, add MIDI Part, MIDI Data.
- Show Lanes.
- Copy the MIDI Part from Lane 1 to Lane 2.
=> Lane 3 and 4 has been created, and the data is copied to Lane 2 and Lane 3.
I can’t reproduce it here. Or am I doing something different from you?