Yesterday's 0.21.1 patch had a bug that would occasionally cause crashes during gameplay. This update should fix that bug.
Update 0.21.1b Patch Notes
Source: Steam Community (opens in a new tab)
Build and release context
Steam update times within 24 hours of this post. Matching dates do not confirm which build it describes.
Build 10532372 · 0.21.0 branch
Steam updated · First observed