I have marked this as "Movement" although it could easily be moved to "Environment" category as it is the player's interaction with the physical environment (in this case a doorway) that is the problem.
I have videoed the situation. As it is I do not know the name of the building this happened in, but those watching the video will recognise it. I was in Svetlo at the time but these houses are throughout the map and I presume the problem would be consistent throughout.
Essentially I suffered a delayed leg break for some reason (I was standing still looking out of the window) and had no ability to patch myself up (no morphine or sticks). I would have normally just crawled out of the room and down the stairs but it seems the player model when crawling is wider than when standing thus blocking my only exit from the room leaving me stranded.