Captions with

Hello, I am just getting started with using the Worlds Desktop Editor and am working to build a world for an upcoming meetup that I am hosting that will include people with disabilities. 

I love that Horizon has a captions option available in the accessibility settings for the user preferences. In my quick testing I was seeing that the captions work and appear for worlds that are not a "Members-only" world. When I tried to test the caption display with my "Member-s-only" world I was not seeing the captions display.

Is this by design? If so, what is the best way to host an event with captions support where only people I invite / allow in can join while the event is in progress?

Thanks!