How is Portaudio handled within a Flatpak?

I’m trying to use Tenacity via their provided flatpak (Tenacity | Flathub). The app itself seems to work just fine, the only problem is that it does not seem to connect to the Jack audio server properly. I’m unable to record from any of the inputs and it does not .

Talking with the developer of Tenacity, they’re unaware what could cause this issue as it works from their end.

Tenacity uses Portaudio to connect to the Jack server.
Would anyone happen to know how Portaudio is handled within a Flatpak? Could anyone let me know how I could diagnose this to figure out if it is a problem at my end, or if it is something else that’s causing this?

Thank you.