Root motion enabled causes the mobs to float away on the new Dev builds
I've tested all the dev builds currently available on the site. all of them have a broken root motion mechanic. in 4.0.8. I've used the root motion to move a mob to the front, and if there is a void, it falls down. But with the new dev builds, the mob ignores gravity and waits for the animation to be done before it falls down after root motion is disabled. Also, in many cases when the idle has root motion enabled, the mob floats away. or moonwalks backwards. Here are few videos from the reports I've received.
https://youtu.be/ucKa4TUszDY ( This rat has an animation where it moves the root bone forward to make it walk, but when it reaches a void, it just ignores gravity, while in 4.0.8 it used to work just fine and it went down when there is no blocks under it. )
https://gyazo.com/2681296a459e22b7dab1ddf9a1d45154 ( this is one of the mobs using root motion in their idle. as long as it's enabled, it just floats up )
More videos showing the idle root motion issue: