[GLTF] What are the limitations of blendshape (morphs) editing

Hi! I am working on a human face model with emotion blendshapes on it, about 52 of them. When I try to modify them all at once some of them approximately after 10th blendshape it does not take any affect. And swapping the texture (map) of the material does not take any affects when the model has blendshapes on it. What are the limitions of working with multiple morphs on GLTF models?