Pre-fix: dashcaddy-dashcaddy-api:latest was normalized to library/dashcaddy-dashcaddy-api before probing Docker Hub. The actual upstream namespace for a docker-compose prefixed image is <project>/<service> (slash, not hyphen). Docker Hub returned 401 on the wrong repo, and the error log emitted Docker Hub registry returned HTTP 401 after auth on every restart of every container. Fix: 1. _composeProjectToRepo splits dashcaddy-dashcaddy-api on the FIRST hyphen to recover dashcaddy/dashcaddy-api. Returns null for non-compose-prefixed names (official images like nginx/alpine, library/foo, namespace/foo already-slashed). 2. _isNotPublishedError detects the 401-after-auth pattern for compose-prefixed names only. Steady-state for locally-built images that aren't published. 3. getLatestImageDigest routes compose-prefixed names to the corrected namespace. Routes already-namespaced names directly. Falls back to library/ for the Official Image path. 4. Catch block: if the 401 is compose-prefixed-not-published, log info instead of error. Real auth failures on legitimate images still log as error. 17/17 tests pass in 1.27s. Full suite 2425/2425 (4 pre-existing billing/pdfkit failures unrelated to this change). GLM stand-in verdict URN: urn:ump:7rhk7keukv3zrx654gbckxaycnuwm4agduf37creqbsoauszopoa