Thanks B.D. for your advice. I checked and in the choir was the same delay setting of a large room (7,1 ms) as with the rest of the band. BUT in the lead vocals was a shorter large room delay (2,4 ms) to put it into the front in sound picture AND reverberation. I took the reverberation away and you were right: it sounded much clearer. Thank you. I changed the remix to the SoundCloud, so you can listen, if it is now better (I think, it is).

https://soundcloud.com/esa-blomberg/jesse-james-reggae-g100?utm_source=clipboard&utm_medium=text&utm_campaign=social_sharing&si=33efd2feb94a40469307177af340c74a

That's the great thing with this group: you get useful advices from colleagues.