On AWS we have 2 Elastic Beanstalk instances and one S3 bucket for a static website. Since app used Login With Amazon we added https protocol. Recently we moved a domain to Route 53, created SSL certificates and configured Load Balancers with https for each of instances.
The website/elastic instances work well when addressed to generic by AWS domains. But we faced with a problem when using the created domain on route 53. Sometimes domain is not available and we don't know why (see attached video). Failed to open route 53 domain
This issue reproduces on Safari when you refresh a web page many times and our servers become unavailable. We spent 1 week trying to fix this problem without any success. The real problem is that we don't even know what can be a reason. Any thoughts? Thanks for any response!