On our MTL zone, reverse proxies are currently not able to update themselves once a configuration change happens (application deployment, added domain, ...). We are looking into it.
19:00 UTC: If your application deploys, your application will not be up-to-date. It will continue to show the old content, the old instance will be kept until this incident is over.
19:12 UTC: The issue has been identified, we are fixing it.
19:20 UTC: The issue was caused by the configuration checker that took way more time than usual before applying each configuration changes. A configuration option to disable those checks inside the program handling the configuration has been enabled. The configuration remains checked by the reverse proxy itself but it is way faster.
Deployments should now be up-to-date.