When attaching a list of transformations as an object attribute, the ShapeDiver plugin converts the list of transformations into a single “Tranform List” object that is ready to be stored as an attribute. When extracting again the attribute from the geometry using the Extract Attributes and Deconstruct Attributes components, the resulting extracted attribute will be a “Transform List” primitive.

In this case, the “Explode Transform List” component can be used to convert back the “Transform List” object into a list of native Grasshopper transformations: