For AWS, nothing involved there is automatic; you have to stop it* and then restart it. It will just stay broken until you restart it yourself. "Brief outage" suggests it might be automatic but in AWS it's not.

* Possibly multiple times. Instances on degraded hosts have a tendency to get stuck and you have to stop, and then stop again to force stop it, and then sometimes even that doesn't work and you have to just wait.

Source: have received lots of "EC2 Instance Retirement" emails