Whenever I press the "open" button or do something that brings me to a new sim, other than the clear button, Newtonian Gravity and Ambient Heat turn off. This is quite annoying, as every time I want to use the Black and White hole, I have to go into the options and fix it again.
Ambient heat doesn't turn off, but Newtonian Grav does. It's because a save saves with it active or inactive, aka the state is kept with the save. Yes, it is annoying.