According to Licensee's report, Root motion is incorrect when use URO.
I Investigated, in the case of "Montages Only" become TrailMode in URO.
Normally Animation Interpolation has implementation, but Root motion interpolation retarn 1.0 everytime.
I think that this diff of interpolation cause incorrect root motion.
1. It set "Root motion from montages only" to a animation sequence with root motion
2. Set "a.URO.Enable" and "a.URO.ForceAnimRate".
2. When play animation in level, Root motion does't interpolation of URO.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-62473 in the post.