Issue with web pre flight

I've been experiencing an issue with map boundaries becoming immovable. Instead of grabbing the boundary point and repositioning it, I move the entire map. The other boundary points are movable but on occasion, one point will act the same as the hand cursor and pan around the map even though the cursor is still a pointer and directly over the boundary point.

https://drive.google.com/open?id=1Lq8wnuRwTXSClBJPOv_RHl6HyrQj7AEu&usp=drive_fs