The main bug seems to work with any kind of firearm. If you push a zombie with space action and then pull the trigger while another zombie is close enough to your weapon to visually touch it, the animation will freeze. Here's the video.
Another bug is with homemade plumbing. I know about that clean water benefit, and I use it shamelessly, but while it's raining, if there is a puddle nearby, my character tends to fill his water bottle from the puddle (I definitely press on the sink).
The third bug is related to fishing system. Fishes abundance parameter is updated only if you start fishing, despite the fact that there is 0% fish. It took me three hungry days of despair to understand that there was a lot of fish in my pond
And there is some tile bugs. First is here, second (double floor) is here