Multiple Instances - Only work if fired in particular order

[paytah232]

Describe the bug

Using the follower docker compose information, the scope to allow for multiple instances only works when the none container is started first. If the non-none container is started first, it gets closed down when the none container is started

watchtower:
    image: containrrr/watchtower:latest
    container_name: watchtower
    environment:
      - PUID=1000
      - PGID=1000
      - TZ=Australia/Brisbane
      - WATCHTOWER_CLEANUP=true
      - WATCHTOWER_REMOVE_VOLUMES=false
      - WATCHTOWER_INCLUDE_RESTARTING=true
      - WATCHTOWER_INCLUDE_STOPPED=true
      - WATCHTOWER_SCHEDULE=0 0 3 * * * # Update & Scan containers at 3am
      - WATCHTOWER_LABEL_ENABLE=true
      - WATCHTOWER_SCOPE=none
      - WATCHTOWER_ROLLING_RESTART=true
      - WATCHTOWER_TIMEOUT=60s
      - WATCHTOWER_NOTIFICATION_REPORT=true
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    restart: unless-stopped
    healthcheck:
      test: ["CMD", "/watchtower", "--health-check"]
      interval: 1m
      timeout: 10s
      retries: 3
      start_period: 10s
    labels:
      - com.centurylinklabs.watchtower.enable=true
      - autoheal=true
    networks:
      - media-network
  watchtower-mousehole:
    image: containrrr/watchtower:latest
    container_name: watchtower-mousehole
    environment:
      - PUID=1000
      - PGID=1000
      - TZ=Australia/Brisbane
      - WATCHTOWER_CLEANUP=true
      - WATCHTOWER_REMOVE_VOLUMES=false
      - WATCHTOWER_INCLUDE_RESTARTING=true
      - WATCHTOWER_INCLUDE_STOPPED=true
      - WATCHTOWER_SCHEDULE=0 0 3 * * * # Update & Scan containers at 3am
      - WATCHTOWER_SCOPE=mousehole
      - WATCHTOWER_ROLLING_RESTART=false
      - WATCHTOWER_TIMEOUT=60s
      - WATCHTOWER_NOTIFICATION_REPORT=true
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    restart: unless-stopped
    healthcheck:
      test: ["CMD", "/watchtower", "--health-check"]
      interval: 1m
      timeout: 10s
      retries: 3
      start_period: 10s
    labels:
      - com.centurylinklabs.watchtower.enable=true
      - autoheal=true
    networks:
      - media-network

watchtower  | time="2025-07-27T00:04:15+10:00" level=info msg="Found multiple running watchtower instances. Cleaning up."
watchtower  | time="2025-07-27T00:04:15+10:00" level=info msg="Stopping /watchtower-mousehole (11cc8131d5fe) with SIGTERM"
watchtower  | time="2025-07-27T00:04:16+10:00" level=info msg="Removing image e7dd50d07b86"
watchtower  | time="2025-07-27T00:04:16+10:00" level=warning msg="Could not cleanup watchtower images, possibly because of other watchtowers instances in other scopes." error="Error response from daemon: conflict: unable to delete e7dd50d07b86 (cannot be forced) - image is being used by running container d777fe648a9e"
watchtower  | time="2025-07-27T00:04:16+10:00" level=info msg="Watchtower 1.7.1"
watchtower  | time="2025-07-27T00:04:16+10:00" level=info msg="Using no notifications"
watchtower  | time="2025-07-27T00:04:16+10:00" level=info msg="Only checking containers using enable label, without a scope,"
watchtower  | time="2025-07-27T00:04:16+10:00" level=info msg="Scheduling first run: 2025-07-27 03:00:00 +1000 AEST"
watchtower  | time="2025-07-27T00:04:16+10:00" level=info msg="Note that the first check will be performed in 2 hours, 55 minutes, 43 seconds"

Attaching to watchtower-mousehole
watchtower-mousehole  | time="2025-07-27T00:04:31+10:00" level=info msg="Watchtower 1.7.1"
watchtower-mousehole  | time="2025-07-27T00:04:31+10:00" level=info msg="Using no notifications"
watchtower-mousehole  | time="2025-07-27T00:04:31+10:00" level=info msg="Only checking containers in scope \"mousehole\""
watchtower-mousehole  | time="2025-07-27T00:04:31+10:00" level=info msg="Scheduling first run: 2025-07-27 03:00:00 +1000 AEST"
watchtower-mousehole  | time="2025-07-27T00:04:31+10:00" level=info msg="Note that the first check will be performed in 2 hours, 55 minutes, 28 seconds"

Steps to reproduce

1. Run docker as above, start watchtower-moushole first, then watchtower, it will close.
2. Run docker as above, start watchtower first, then watchtower-mousehold, it stays open.

Expected behavior

Both container remain running, regardless of the starting order, as both use a unique scope label.

Screenshots

No response

Environment

• Platform: Linux - Ubuntu
• Docker Version: 28.3.0

Your logs

As above

Additional context

No response

[github-actions]

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