ShooterGame blendspace thumbnail has distorted mesh

In ShooterGame, the thumbnail for the HeroTPP_AimOffsets blendspace asset has a distorted mesh. When the asset is opened in Persona, the mesh is fine.

I haven't seen this issue with other blendspace assets..

1. Launch UE4Editor.exe ShooterGame.
2. In the Content Browser, navigate to Content/Characters/HeroTPP.

RESULT:

The thumbnail for HeroTPP_AimOffsets.

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