Praise @zenit !
A miracle has happened, search has finally and truly improved!
It now finds “Werther Corelli” albums - I had given up hope.
as for “Trovatore Pavarotti”
on Roon desktop Mac, so much better. But on iPhone doing the same search - perfect!!!
So there is a difference in results between iPhone and my Mac.
Library results for “Turandot Nilsson”
So finally one of the things I hated most about Roon and have spent endless hours giving examples on this forum (myself thinking I must be crazy, because so many probably thought I was only imagining stuff) It just shows, it was broken and finally has truly improved and is working so much better now,
So thanks Roon for listening!
I will test more - but up to now it looks so much better.