Hi! That last room potion bug should be fixed.
You have the latest build? What do you mean by "escaping the dungeon" :)
I downloaded the Windows 10 64-bit from itch.io yesterday. I don't know how to tell what the last build is. By "escaping the dungeon" I mean win. I recall the game telling me "you've escaped the dungeon" or something like it, when I won a second time.