I may have just encountered a bug, in the candy factory, after squeezing through the vent with +1 fattened, if my characters are +1 to any fattened, inflated or waterlogged, or take digestive tea outside of combat, the sprites do not go away and block out my vision. In combat, if the changes happen then, they will instead take up my vision of the combat space, blocking my view of the enemies, they will however disappear after battle. I have tried reloading my save and reloading the page but nothing seems to be able to get rid of the sprites that appear outside of combat.
Update: Entering a dialogue or cutscene seems to fix the above issue