Hello mettam
The first thing to verify is whether the rig is imported correctly into Unreal Engine, the skeleton and it's bones have to be named exactly the same in Maya and Unreal, and the root bone you are syncing to has to be identical as well. If one of these things are not done correctly, it will not work. Also, if your rig in Maya contains custom nodes or Maya specific nodes that don't export correctly through FBX, then you may run into issues.
This is from the Live Link Documentation: "If your character behaves strangely in Unreal, check to make sure its skeleton hierarchy is the same between Maya and Unreal. Live link requires the hierarchy and bone/joint names to match exactly. Also, Unreal only supports FbxSkeleton and FbxMesh nodes, so if your original rig uses other nodes you may need to make adjustments to ensure compatibility."
Best regards,
Carlos