fetcher.load() on a container with index.html returns html

Querying a folder that contains an index.html with rdflib's Fetcher returns the index file instead of the desired triples.

I tried to query my root url https://ludwigschubert.solid/community/ with a rest client using the Accept: text/turtle header. That gave me the file in turtle format. So far so good.

Doing the same with the fetcher, which sends

Accept: image/*;q=0.9, */*;q=0.1, application/rdf+xml;q=0.9, application/xhtml+xml, text/xml;q=0.5, application/xml;q=0.5, text/html;q=0.9, text/plain;q=0.5, text/n3;q=1.0, text/turtle;q=1

gives me html