Superstereo have provided some streams which do not contain metadata (thank you @Erik_Jego) and so not stop at the of each track. Thus
SuperStereo 1 - Yacht Rock
SuperStereo 3 - Pop & Disco
SuperStereo 4 - Ballads 80’s,90’s,00’s
now have cd quality streams again and appear in the database.
(Because of the efforts of @alec_eiffel , these streams will nevertheless show metadata in Roon)