Pose watches don't display correctly with compatible skeletons

"Hello, we've found a quirk with ABP's pose watch and compatible skeletons. Same setup as above. We have skeleton A as the base and skeleton B as a compatible skeleton. They both share similar hierarchy (although not identical) The ABP has skeleton A by default but will use skeleton B at runtime. Pose watches look correct at preview time. During runtime the pose watches look incorrect. However, setting the PreviewMesh at runtime to skeletonB fixes the problem. I couldn't find a relevant bug in the system but I wasn't sure if it was the intended behavior."

1. Add 'SK_Mannequin' as a compatible skeleton to 'UE4_Mannequin_Skeleton'.
2. Add 'SK_Mannequin' and 'UE4_Mannequin_Skeleton' to a level.
3. Set both to use 'ABP_Manny' animation blueprint.
4. Open 'ABP_Manny' and add a pose watch on a node.
5. Start PIE, set SK_Mannequin as the debug object in Persona, verify pose watch displays correctly.
6. Set UE4_Mannequin_Skeleton as the debug object

EXPECT

The pose watch in PIE and in the persona viewport match and appear correctly

ACTUAL

The pose watches do not match.