Morpth Target not worked in One Mesh

Good day brothers)

I downloaded Zombie models from the Marketplace. Models in two versions, for dismemberment, consisting of several meshes and a model consisting of one mesh.

Skeletal Mesh have Morph Targets.

The problem is that when I try to change the morph targets in a single Mesh model, nothing happens.

But if I change the morphing targets in a model that has multiple Skeletal Meshes, then the Model changes its appearance.

The Morphing Target for the Model of one Mesh is the Mesh itself.

Morph Target for a Multi-Mesh Model separately Skeletal Mesh “Head”.

I use the same code for both, changing only the Target of the morph.
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Tell me, what am I doing wrong?

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