Bug for version 5.2.1
After chapter 5 begins and you are sent out to go find shards, if you use the teleport item to go to Abaleth town( probably spelled wrong but you should understand) you are forced into the mila as a vampire story, and can't go back. Thankfully I recovered with the autosaves. You retain your human form but will still be asked to drain or turn enemies when defeating them, and as a human, you are incredibly strong vs the enemy hunters. I don't know of any other details, but you cannot teleport "back" to the human world after getting there.
EDIT
This bug can be reproduced simply by teleporting to Dorian Manor at all around this stage in the game. You cannot teleport away back to the human world. You can use the stone there to go to the vampire side, but you can also just walk out of Dorian Manor to escape it.
This is specifically in the Android port.