Hello Railway Support,

I am experiencing a reproducible PostgreSQL authentication issue in my Railway project.

Project: eloquent-encouragement

Environment: production

I created two separate fresh PostgreSQL services:

• Postgres-5THB
• Postgres-L--w

Both services performed a full clean initdb initialization with fresh volumes and completed successfully.

However, external connections from my n8n service fail with:

FATAL: password authentication failed for user "postgres"

The n8n service uses Railway service-reference variables from the corresponding PostgreSQL service:

PGHOST

PGPORT

PGDATABASE

PGUSER

PGPASSWORD

This happened independently with both newly initialized PostgreSQL services.

The PostgreSQL servers themselves are online, user postgres exists, and remote authentication is configured with scram-sha-256.

It appears that the Railway-generated POSTGRES_PASSWORD / PGPASSWORD value exposed to other services does not match the password hash initialized for the postgres database user.

Could you please investigate whether PostgreSQL template credential generation / propagation is functioning correctly for this project?

Please do not delete, recreate, or modify my existing services without my confirmation.

My existing bridge service and Amazon SP-API credentials must remain untouched.