Metahuman Body Warping Issues

Can anybody explain why this is happening to my MetaHuman? It looks fine in my viewport but looks like this in the render if I delete the control rig to rebake it the head permanently disconnects from the body and I’ve to add the MetaHuman back into the world and sequencer all over again which is an issue as I’ve already done so much work on the keyframes. Any help/advice much appreciated!