Now all IPv4 connectivity seems to be restored and only IPv6 is not up and running yet. So we have a "Partial Outage" at this point.
This will make websites and apps feel "unstable" as IPv6 will not connect properly, while IPv4 will.
We assume this is due to the Datacenter guys still having problems with "strange" ipv6 network behavior. At least the most essential part of the network is up now!