Hi Injection,
i'm a player of server 661. We have same problem and the same problem is even affecting server 663.
I've discovered that all of these 3 servers are related to the same IP address: 5.101.166.205
All of them respond at the same IP address but on different port. (sorry if i'm going too much technically)
As you can see during the crash, most of the time the only 3 servers that are almost unreachable in the server list are 661/662/663.
This discover drive me to think that the problem is not strictly ARK related but it's a problem on a lower level affecting the Host/Server/Virtual Machine under the Ark Server Istances.
Here below i'm giving u the official form to open ticket related to server issues, to be honest i'm sending ticket since yesterday morning and as today nothing changed.
https://docs.google.com/forms/d/e/1FAIpQLSd8Xn6z_RP7fxGgH_86VZAKDzqmbDboanrC51GSpr_1v9_PLA/viewform?fbzx=-6364567780317969397
Hope to have been helpful and a bit more responsive then our Wildcard/Nitrado friends who are not taking our beg for help that serious...