I've just published a small update which fixes a bug in the evolution system.
Now, it should be possible to unlock all evolutions by treating your Kukumushi pets differently!
Please let me know if you have any problems.
1.0.10 - Evolution Bug Fix
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 11145707 · public branch
Steam updated · First observed