Player with multiple instruments - does not show in all flows

Score with Fagot2 -> holds Fagott/Kontrafagott.
A flow was added where Fagot2 only hold a fagott. (so ther were no notes in a second stave for a kontrafagott)
The Kontrafagott does not show in that flow (in Edit mode/not in galley view nor in page view), meanwhile it’s there in the Play view for the flow.
How could I get it back?
(problem pesists in 2.2)
flwo-with-contrafagot.jpg

I dont now why the editor kicks out the scond attached jpg.
Try it again…

Can you please attach the project itself, rather than a picture of it? Unfortunateiy it’s not possible to diagnose problems in a document-based application from pictures of the document: the document itself is required. Thanks!