Abnormal Behavior Observed When Playing Animations Retargeted with IK Retargeter in MetaHuman 5.3

When playing animations with large movements, the facial area stretches, and in severe cases, the root’s rotation appears to momentarily spin.

This issue consistently reproduces in Unreal Engine version 5.3.2 with a new project. I used the ‘Aoi’ preset from MetaHuman 5.3. The same problem occurred when I upgraded a MetaHuman created in a previous version to 5.3.

It seems that this issue does not occur when the LOD (Level of Detail) is forcibly fixed to a specific level, suggesting that the problem arises during the LOD change process. Has anyone experienced a similar issue or found a solution?