When scrolling a TableView while touching first a custom cell like CheckBox, the checkbox gets focused. The best thing to do here is to wait for the touch to finish to see if there was a gesture or just a tap/click.

One solutions is that we'd need to consume (synthesized) mouse pressed events until we know if there was a gesture or not and then re-fire them to the underlying control. If this would be a common case in other controls, it might be worth to implement some general utility class for holding and re-firing an event.
Another approach is to fix this in other controls so that they focus on synthesized mouse release, not mouse pressed.