I found a hidden Pixel feature that explains what's wrong with Bluetooth (and Android Auto)

Google added a Bluetooth diagnostics tool to the Pixel Troubleshooting app to help identify connection problems.

Users must update the Troubleshooting app (v1.0.885948717) from the Play Store to access the feature.

The tool runs tests, offers device-specific options, and suggests fixes like re-pairing or contacting the manufacturer.

Pixel devices also include other diagnostic tests in the My Pixel app, and Samsung offers a similar diagnostics feature.