I'm having trouble making Audible work properly in GrapheneOS. I have Graphene installed on a Pixel 7 Pro, and I have to delete and reinstall Audible every few days, since the app stops being able to download audiobooks--it hangs at the preparing to download stage--a day or so after being newly installed. I'm also finding that books get removed from my device for no apparent reason.
I have given Audible network permission, but no other permissions. I am using ProtonVPN, but it doesn't matter whether this is connected or not when it comes to downloads. I haven't had similar difficulties with any other app.