I have the same problem on the same phone. I am talking with the airmusic developer and they said there is a bug in Graphene OS that is causing this that has been reported but I was unable to locate a bug in the issue tracker. Upstream also had an issue where when the screen is locked the audio cuts out. That fix is working its way to devicss slowly now but still hasn't landed on the pixel 8 pro. I'm hoping once it lands in upstream and is brought into Graphene it fixes the problem as well but if it doesn't and I can't find another bug I'll likely open one.

Here is the upstream bug: https://issuetracker.google.com/issues/369904692

It's not really bothering me, but this is also occuring on my pixel 9 pro.

I also made a thread about this... Pixel 7a.

Providing an update for all interested, I have another Pixel 8 Pro that is on stock and in the last day it received two updates the final update: AP4A.250105.002 fixed the problem I was experiencing so I expect it to work its way through to GOS soon enough!

12 days later

Looks like whatever fix happened in Android was already applied to GrapheneOS and i've since received another update. This looks to be a bug directly in GOS at this stage.

  • de0u replied to this.

    norza Looks like whatever fix happened in Android was already applied to GrapheneOS and i've since received another update.

    The flow of code from Google to AOSP is very different from the flow of code from Google to devices running the stock OS. Sometimes GrapheneOS is ahead. Only people watching change logs on both sides are in a position to predict when something will move where.

    norza This looks to be a bug directly in GOS at this stage.

    That is very unlikely.

        • Dde0u

          • Post #10

          norza If the fix isn't in GrapheneOS after the next quarterly Android release, inquiring then would likely be timely.

            4 days later

            • Dde0u

              • Post #12

              norza Looks like it was a GOS bug...

              It appears so! It looks as if the first fix for an upstream issue was incomplete. So it's good that you reported the seemingly-related upstream fix didn't resolve the issue. And it's good to hear that it's working!

                2 months later

                No audio in screen recorder for me. Pixel 7 pro.

                No audio for me either.