Build failure due to infrastructure bug

Builds are failing for us due to an “infrastructure bug”. Here is the error message we are getting:

Looks like we had a bug in our infrastructure, or that of our providers (generally GitHub or AWS). We should have automatically retried this build. We’ve been alerted of the issue and are almost certainly looking into it, please contact us if you’re interested in the cause or if the problem persists.

We tried rebuilding without cache but it gets queued forever. Please note that we do not have any cache_directories directive in our circle.yml file. Circle CI team, can you please help?