We implemented Digital Key in our app, and it's working fine when the app is published through any of the Google Play Console methods, including Internal Testing.

We are using Google Play App Signing, so the app is re-signed with Google's signing key after uploading with the upload key.

We are also using Firebase App Distribution, however we have no control over the key firebase signs with for bundles, and even if we use apks there, they are still only signed with the "upload key". These builds fail the test with Digital Key, as the framework is returning the devices as "not compatible", even though the market build works fine.

All other Google/Firebase services that we use work on both types of builds.

Both SHA-1 / SHA-256 key fingerprints for both signing and upload are added to the Firebase project.

We only experience this issue on Google Pixel phones, not Samsung phones.

What steps can we take to get the Firebase builds to work with this?