I’m not sure if this is a bug or not. But the sound when the flask hits the ground is REALLY low. The sound itself is a bit flaccid but that’s subjective. (I wish it was a proper bang because - you know - fire and explosions and shit.) But the sound being so low that I can barely hear it sounds like someone just forgot to the volume slider to 20% instead of 100%.
Normal Acid flask doesn’t have this problem. Only when I convert it to Fire.