The 503s have stopped. A request that failed earlier can be retried. Runs that get through continue to complete.

A stalled API process was being restarted, and those restarts are what returned the 503.

We've stopped restarting a stalled process. A request that hits one can still fail, and then succeed on retry. Runs that get through still complete.

We're still looking for what causes the stall.

The API is intermittently returning 503s. A request can fail and then succeed on retry. Runs that get through still complete.

We're investigating.