Even if this would work, means I am dealing with symptoms, not with causes.
I am expecting Roonlabs to solve unnecessary splitting of Artists.
Furthermore „search“ only shows one of those artists.
This metadata issue is not what a user can solve.
List all artist from the “Artists” button on the left side menu.
Select the ones you want to merge and there should be a “Merge Artists” button at the top right of your screen.
Select the primary artist and you should be done.