EKS control plane didn't recover after AWS outage

We had EC2 instances and it seems our control plane impacted by a euw2-az1 outage. AWS indicated the issue was resolved but our control plane carried on giving intermittent access denied errors and failing to connect to worker nodes. We're in 3 zones and the control place should be highly available but it seems at least 1 node in the control plance was behaving badly.

Is there a way to restart the services in the control plane?

We ended up fixing this by upgrading the kubernetes version, but this won't always be an option available.