I put the mould in, then ore, and then pull lever to go down. When it bugs out the hammer comes down but the platform doesn’t drop. Save/reload, restarting program, traveling out and back, and coming back later in the story don’t make a difference - I can eject the mould and drop the hammer, or put 2nd ore in if it bugged out on the first, but it’s just permanently stuck.
I have used the door spell to pop down and hit the button. Sometimes the platform will go down, sometimes not. After it’s bugged even getting the platform down doesn’t help - the lava wheel is stuck and never fills the platform, and dropping the hammer doesn’t make an item.
Yeah I moved on, still annoying though :)