I wanted to follow up here as I ran into the same issue where my skeletons visually were matching but the mesh was popping to a different location, basically the root motion wasnt seeming to work.
My issued ended up being the Animation Mode on the character was set to a blueprint that wasnt extracting root motion. Switched the Animation mode on the mesh to either a custom mode or ABP that was doing that, and the mesh now stays with the skeleton.