Principa Propagation using CAP : Destination type OAuth2SAMLBearerAssertion

I am usnig Nodejs through CAP.

cds.connect.to('SF') and other statement like cds.run are working perfectly fine with destination type Basic.

However i have changed destination to OAuth2SAMLBearerAssertion and not system is not able to load destination.

My Web Application is already xsuaa authenticated and similary nodejs service as well. destinatoin and XSUAA instances are already bind.

Please help. I can share source code also.

Thanks!