Title says it all, I can swim naked in molten nethersteel and nothing happens.

(copied from the Discord conversation about this)
There was some code I attempted that tried to fix this. It worked, but the way I implemented it caused things with large hitboxes to lag out the game, particularly with large cannons. I commented out the code. Now, I could make an exception but there would be so many other cases outside of the mod that I wouldn't be able to cover, so this is why this issue persists for the time being.