4 months ago - Not Simon - Direct link
This hotfix addresses numerous atmospherics issues. There has been a wide range of atmosphere issues reported that all stemmed from the same issue. The most common, or at least the most noticeable, one was outside atmosphere contaminating rooms.

This will no longer happen but some saves may have devices with bugged atmospheres in them, this can be fixed by deconstructing the device completely and then rebuilding it.

4 months ago - /u/ - Direct link
A lil somethin somethin: You can find the details for this event on the announcement page here.