I am creating two databases: product, and test one:

version: '3.8'

services:
  db:
    image: postgres:13-alpine
    environment:
      POSTGRES_USER: myuser
      POSTGRES_PASSWORD: mypassword
      POSTGRES_DB: mydb
    volumes:
      - postgres_test_data:/var/lib/postgresql/data
      - ./db/create_script.sql:/docker-entrypoint-initdb.d/create_script.sql
    ports:
      - "5432:5432"
  test-db:
    image: postgres:13-alpine
    environment:
      POSTGRES_USER: myuser
      POSTGRES_PASSWORD: mypassword
      POSTGRES_DB: mydb
    volumes:
      - postgres_test_data:/var/lib/postgresql/data
      - ./db/create_script.sql:/docker-entrypoint-initdb.d/create_script.sql
    ports:
      - "5433:5432"
volumes:
  postgres_prod_data:
  postgres_test_data:

This docker compose works, it created images, started containers.

However i when i try to conncet to db image, it says invalid credentials, HOWEVER when i try to connect to test-db which is literally copy paste with changed port, it WORKS.

What is causing this? These images are newly created, with new volumes and literally copy paste of each others, how come one works and one not?

Logs do not specify any error for neither of them.

Thanks for help