Additionally, was booted from the server.
Restarted client, and now server will not allow me to join (says spigot 1.31.1 is running and not compatible with my client) and it still shows Snape and myself still connected.
I suspect some kind of DDoS attack, but I cannot be certain.
*EDIT*
Attack seems to have stopped. Server is accessible once again. Ping is still slightly off, but that is to be expected.