Loading my collection some album load requests fail reliable with 401 responses. Example:

E: 15:16:37,532 /usr/lib/python3.7/site-packages/picard/webservice/_init_._handle_reply:383: Network request error for https://musicbrainz.org:443/ws/2/release/4c54ee58-86df-3ba5-aaad-6b284293141b?inc=release-groups+media+recordings+artist-credits+artists+aliases+labels+isrcs+collections+user-collections+artist-rels+release-rels+url-rels+recording-rels+work-rels+recording-level-rels+work-level-rels: Host requires authentication (QT code 204, HTTP code 401)

E: 15:16:37,534 /usr/lib/python3.7/site-packages/picard/album.error_append:222: Host requires authentication

The same URL works fine with browser. Also other albums work reliable with the same settings.

I currently don't understand what is happening, could also be a server issue. Needs to be investigated.