Hi there,
By default it’s currently not possible to animate the root control independently of the rest of the character (essential for root motion animation in Unreal) without creating an additional control above the root to act as a space for the body_ctl (and other translation-dependent controls under the root such as feet IK).
While the ideal would be for the world_ctl to be usable as a space option it appears it cannot due to it being created during the build process. I request either enabling this automatically as part of the build process, or if not possible simply adding the extra control above the root (and setting is as a space in the relevant IK Reference Arrays) to the EPIC templates.