When you increase the value of Blend Shapes from 0 to 100, Cloth component distorts (look the attached gif).

Reproduction steps:
1. Create the new project;
2. Import the attached package;
3. Put the prefab of Bird in the scene;
4. Enter Play mode;
5. Observe a bird feathers;
6. In the mesh_SparrowFeathers object, increase the value of Blend Shapes to 100;
7. Observe the bird feathers;

Actual result: The bird feathers distort and shrivel.
Expected result: The bird feathers should look similar like the component Cloth is turned off.

Reproduced with: 5.3.6p3, 5.4.1f1, 5.5.0b11, 5.6.0a3.