Ughh, I see what you mean. Something must have silently messed up when the server got upgraded, probably a function that doesn't work anymore. Thanks for the alert, I'll try to get it fixed asap.
UPDATE: Found the bug. It was because of the server upgrade. Splatoon should be fixed now. Dealing with the others now.
UPDATE 2: All should be fixed now. Thanks for the alerting me about the issue.