Today, between 16:00 UTC and 17:50 UTC, some reverse proxies configurations updates went missing. Applications that redeployed during this time frame may have not been correctly updated on some of our reverse proxies leading to HTTP 503 / This application is redeploying or HTTP 404 / Not Found error alongside the regular applications responses.
The root cause of this is still unclear, additional investigations will be performed. A bit before 16:00, we had an incident on an internal tool that may be related.