Alternative scenario for multiple drag and drop items.
A variable is set to TRUE when the drag item is dropped correctly on the target area.
If the learner changes it to an incorrect state before hitting the submit button, the result will still be correct since the variable stays to TRUE.
Thomas Hollaender from Denmark triggered this scenario for me. Since it might be unlikely for a user to change to the incorrect state afterwards, it still can happen and therefore I developed other triggers, where the system test the state of the dropped item every time it the drag item has beeen (re)dropped.
Watch the screenr for the explanation: https://player.vimeo.com/video/204928692
Any alternative suggestions are welcome.