I cannot reproduce it on every try, but it’s happening very often. Look at picture and continue reading bellow:
The single note you see on Lane 3 (marked with red line) should be in Lane 2.
Used Retrospective recording in loop, so got those three lanes at once. Lane 1 is first loop, Lane 2 is second loop, but Cubase made 3rd Lane with single note I played in second loop and it should appear at beginning of Lane 2, not Lane 3 which should be empty at all.
This happened on both of my computers using C12:
Win11 Home on 11th Gen Intel(R) Core™ i7-11700KF @ 3.60GHz, RAM: 32.0 GB
Win10 Pro on AMD Ryzen 5 2500U @ 2.00GHz, RAM: 20.0 GB