Thanks for replying Erwan ( and for the other answers which I will come to in due course).
I too download from Qobuz. I have also dealt on other forums with people having trouble with Qobuz metadata. The reason is that Qobuz offers two ways of downloading. If you pick the wrong one for your purposes it seems that difficulties may arise.
When you look at the download page you should see two options. One is to download to your Qobuz player app. The other is to download to hard disk. It seems that you may have been doing the former where the metadata is in a format to be displayed in Qobuz’ own players. The latter option provides the metadata in a universally applicable way.
Here is an example of one of my downloads from Qobuz. You can see that the file itself has the main fields in a normal way and that the track title , artist and other information are in separate fields:
The file for each track can also be displayed in ID3 format;
Again there is no concatenation of data from different fields.
May I suggest that you go back to your purchase page in the Qobuz download store and download the album again from the right hand downloading option ( this has a green option title " Download my Music" , the other version for Qobuz Mac or Windows version shows in blue) and try again. You will need to install a small piece of freeware to unzip the downloaded folder called 7-Zip.