So...
Firstly, sorry for the late comment, my (now adult and happy to be independent son) needed his dad to solve a problem ; independent my ass
Secondly, as far as I've seen there's no need to update the mod. But I can have missed something, so as usual don't hesitate to tell me if you see something.
Now for the problems...
I want to start by saying that I believe you, really. You had this problem, I have no doubt about this.
Now, the problem I have, is that this can not happen. To explain this, imagine the situation like this:
There's a room, you use the door to enter inside it. So far everything is normal. But suddenly, when you decide to exit the room, you face a problem. Wherever you look, there's no door, only plain walls.
It's exactly the same problem here. If the game led you so far, there must be a "return label", there's no reason for a "return label" to not exist.
Therefore, it really seem to be a bug in the game or in a secondary mod that you are using, if you use one ; something that would have "jumped" where it should have "called".
There's also a, small to my knowledge, possibility that it happened if you just load a save from a previous version, and the said save was made in the middle of the scene. But once again it shouldn't happen, Ren'py is supposed to be strong enough and find a way despite the problem ; else most save files for this game would be invalid since years.
Try the right key combination,
shift
+
home
, it should works better.