Model problems

I’m having a problem with models exported from 3d Studio Max using the Datasmith plugin when using the Handheld AR template, as you can see from the attached image. I’ve tried using models with and without textures and I’ve tried importing .fbx instead of Datasmith all with similar results. The model looks perfectly fine in Unreal it only gets distorted when viewed in the AR app, it’s running on a Galaxy Note 8. Any help would be greatly appreciated.