when going through the oauth flow on mobile (firefox, android) and trying to sign into any account using a passkey saved in a password manager (proton), almost all of the time it will fail with the error "The operation failed for an unknown transient reason". no logs are shown in either the tranquil logs or the browser console.
my tranquil setup can be seen here: https://tangled.org/lesbian.skin/beyonder/blob/main/hosts/seer/services/tranquil.nix
Was a browser issue 😦