forkwhilefork I have discovered that, of all things, TikTok is able to record audio and video at the same time, which to me makes it pretty clear it's a software issue.
If it's a software issue, then one or another form of replacing the software should make it go away.
If replacing the software does not make it go away, and in particular if a large majority of people using the same software do not experience the problem, then honestly it's probably not a software problem.
Some things to maybe try:
- Clear cache and storage for the camera app(s) that exhibit the issue,
- Wipe all GrapheneOS user data by backing up important data and doing a "factory reset",
- Back up data and flash back to Google's stock OS.
If the issue is exhibited while the device is running Google's OS, it really likely is a hardware problem -- or at least not a GrapheneOS problem.
We are curious to learn what you discover.