Drag and drop "over" not working consistantly

Hi, I have been trying to get my drag-and-drop features to work consistently. I have a few drag and drops (freeform), and they have a Submit button that I have created. I want the submit button to either be hidden or disabled until the user has dragged over all the drag on the drops. I set the state of the button to either disable or hidden to start. Here's the Trigger: Set state of "Submit BTN" to Normal, when the state of all the rectangles is "Drag Over". The drag over isn't working consistently. I have attached a video. Sometimes it works and sometimes it doesn't, It needs to be that the user can mover the drag anyway, but the "Drag overs" are the problem.