3ds Max MCG Controllers don't work with Datasmith

Hi, I’m trying to make animation in 3ds max 2019 and then export whole scene to UE4 by datasmith exporter. Everything works great except MCG Controllers. When I export scene by datasmith, MCG controller freezes. FBX export works great. I made gif to show this bug. Has anyone encountered this problem? Maybe someone would advise alternative solution to MCG Ray to Surface controller?