About two weeks ago all three of our Aurora DB instances in eu-central-1 suddenly crashed and were offline, to no avail, for almost 55 minutes. Simultaneously w

About two weeks ago all three of our Aurora DB instances in eu-central-1 suddenly crashed and were offline, to no avail, for almost 55 minutes. Simultaneously we had random network problems going on within our eu-central-1 VPC which we were unable to diagnose. We still don't know what happened because we're not getting any answers to our support request. The AWS health dashboard was all green the entire time. No notifications were sent out.