if isinstance(docs, List):
    docs = self._dict_list_to_docarray(docs)

_dict_list_to_docarray expects a list of dictionaries which is then transformed into a DocList. However, since DocList extends List, the condition is true even if docs is already a DocList, which then leads to an error.

We already fixed this in one place but there are other parts too that need an extra check.

Found while working on milvus pr