problem is you cant see them, it's just a very small spot kind of away from the mtn biome, that nearly instantly strikes you with the freezing debuff. Specks of space, as I mentioned about as big as a toon.. As if the temp overrlay is off by a few tiles when it gets generated, but since you cant see it problems with it may not be readily apparent
this is a very very small mtn biome, surrounded nearly entirely by meadow.
My hunch is that how temp is generated and distributed is the issue, its not aligning, one or both are off a few tiles, columns and rows. Mesh not aligning.