Album mbz id known but release group not populated

[ginjaninja 570]

I think the album description fetching is very good and informative.

I was surprised to find a couple of albums in collection (without having to look hard, I suspect there are a few)

where the mbz album id was populated and the album description was either blank or the old last fm one with html tags.

in both cases by manually populating the release group id (which was blank), the good album description fetched.

 

but as the there is only one known (to mbz) release group id for an album id....shouldn, t mb3 have  already populated the info?