async-graphql: Can not make Tracing extension work

Hello, I’m trying to set up the Tracing extension to report execution traces to Jaeger. Whatever I do I can not make it work - spans from extension never get to the dispatcher. I don’t think it’s tracing problem, because spans from other places (e.g. actix-web middleware) are working. Maybe I’m doing something wrong and there is some working example exists somewhere?