Mini Player shows metadata "Grouping" in track name field

The metadata “Grouping” field (when supplied by the source supplier-Qobuz in my case) is appearing in the song title field in the minimised player.

Sometimes it occupies the whole field (so, eg. it seems I have a few hundred tracks all called bebop !) - other times it prefixes the actual title and partially replaces it.
Can this be tidied up ?