Miasma should disappear after the rift closes

[Kacpert25]

With miasma from rift this isn't as problematic. There's not so much of it that burning it all would be difficult.

In the fumarole biome, however, the situation is dire. Because the miasma produced by the fumaroles and geotermites doesn't disappear after the rift closes. Which cause the biome is practically constantly covered in miasma.

Spoiler

(Btw. the lack of miasma on the right side of the screenshot is a graphical bug. Miasma is there, but it's simply invisible.)

It's lame in my opinion that the biome can't be deprived of miasma on its own while the rift isn't active.