Yeah, we got a similar alert on the Mark VIs so we'd know why our train was stopping. But I don't remember a door just literally popping all the way open, just maybe being slightly ajar like you said.Back in the old old trains we'd get a "door unsafe" light. Now that could be anything from a door loose to full open (you'd have to check the mirrors). Of course you couldn't do anything (these were the old manual doors). If a door was ajar going into the contemporary it would just get sheered off (now you know why that support is so big) and land there. 90% of the time it was just the door wasnt fully clicked but it was closed.