UE5 Livelink Mouth Paralysis

Hi All, I have livelink working with metahumans in UE5. However, only the left side of the mouth opens and closes. It kind of gives a Sylvestor Stallone feel. The rest of the face is working and it even looks like areas around the right corner of the mouth is moving, but the right side of the mouth, right side lower lip is not animating. I have tried this on two machines running UE5 and multiple iphones, ipads with the same result.

Running UE4 with metahuman and connecting livelink works fine so it feels like UE5 issue.

Has anyone else experienced this problem?

Many Thanks