Let me walk you through my 3 different answers.

1. Shrinking the bowl and the plate at the same time might just pop the seal when left in the freezer all night. It would only take a couple Crystal forming in the right spot to break that seal.

2. Blasting air into the seal could potentially resolve the pressure difference holding the bowl to the plate or force enough air into the bowl that it actually builds positive pressure inside and that pops the bowl off as well.

3. Heating the bowl would get it to expand slightly and cooling the plate would make it shrink slightly so doing them at the same time could cause the perfect seal they have formed to shift enough that it allows the pressure to equalize/release.

It’s less about heating the gas inside the bowl to reverse the vacuum and it’s more about breaking the seal that has formed in the first place.