When I press a white button and then the B-button, it typically lets me return to the main screen of that particular mode by a second press. Not so when I am in EDIT mode. Then the B-button takes me to the list of takes and the only way to get back to the main screen of that mode is to press the white button again.

This might not be considered a bug and only a matter of consistency in the user interface, but I thought it worth mentioning.