Make sure that only the take you want to cut is selected.
I’ve just tried this by recording three tracks, looping three times to create three takes/lanes for each track. On initially opening the folder all tracks/lanes just recorded are selected. So click in blank space to deselect them all and then re-select just the lane or lanes you want to edit.
I’m on N7.1.40
That should do it, unless I am misunderstanding you.