can not retrieve endpoint suggestions

Hi, you may want to try to create Route53 endpoint monitors on the endpoints for which you get the warning and see how those monitors see your endpoints. If unhealthy, you will probably get additional error messages that should help in finding the root cause.

For such monitors, see https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/dns-failover-determining-health-of-endpoints.html

Best,

Didier