We are currently experiencing issues with deployments.
Some applications may have been redeployed multiple times with the Monitoring/Unreachable reason. Most of those deployments were false positives. Other applications may currently have troubles deploying.
We are working on restoring the service.
EDIT 15:49 UTC: The underlying issue has been found and fixed. Some deployments may have failed even when there were no reason for them to fail. You can start them again if needed. If you still have deployment issues, feel free to reach our support team.