An issue intermittently affecting OSSRH-hosted projects was fixed; normally, we instruct our CDN to purge content related to a component when it is published. This prevents 404 responses - returned to any requests for the component before it was published - from being cached.
However, if this purge failed, it was never retried. Subsequent requests for the component could return the cached 404 depending on the CDN node involved in the request.
Retry logic and monitoring has been added for this CDN purge action.