That sure is weird, I'm going to make a guess that it has something to do with the site move to Fandom. Have you given your consent to the move? Even I wasn't able to access your profile but changing your name back resurrected it.
Hi, first of all i would like to know what happened to my name :) If this is the way to change my name I would like it to be : Syndicate. (If it's taken SyndicateX87) Thanks
I think it has something to do with the site move from Twitch to Fandom. Did you give your consent for the move? I haven't been told any information about what's happening but I can see them deleting profiles.