Game breaking bug air pressure

There's your problem:

Off-gassing debris (a botle is considered as a debris) won't overpressure if the cell they are on is over 1.8kg of liquid/gas. In this case, there is only 76.1g of polluted water, well under the 1.8kg threshold.

While the mechanic is a bit confusing, I'm pretty sure it's not a bug and working just as expected. Changing that mechanic would have wide-ranging impact on the game.

Thanks for clarifying.   That was pretty confusing.