Resource method returning CompletionStage<SomeType> has CompletionStage instead of SomeType as routing type

Jersey 3.0.8

I have resource methods that return CompletionStage<SomeType>, and MessageBodyWriter's that map to SomeType. However these methods are not considered because the response type is set to CompletionStage and not SomeType when doing the matching to find best method for invoke.

It seems that there is a type unwrap missing somewhere in the process, somewhere around AbstractMethodSelectingRouter.

My current workaround is to ensure all GET methods in the resource returns CompletionStage<>(handling different media types), even though some of them don't need it, so that they are equally disadvantage by not doing the correct type matching.