AAS before processing with Basyx: it has an empty manufacturer name:

AAS after processing with Basyx: the manufacturer name is gone:

So, basically the difference is between "" (empty string) and None (null).

IMHO, the cause is in line 219 of xml_deserialization.py

Proposed fix:

    if element is None:
        return None
    return element.text if element.text is not None else ""