@hachouma can you specify your problem more?? because normally in ambient heat this should happen and cool down after a while.

Actually, I figured this out early on.
If you draw a pixel of dmnd and heat it up to [place 8 or more digit number here], you can create mass heat and pressure. so much that trying to reset the pressure using the plus/equal button is futile.
it only works with ambiant heat
This is a bug that should stay (to satisfy those who want to see instant mass destruction)

btw, you don't have to "delete it and use air" it works fine just leaving it there