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Why am I suspended from the chatrooms of this site for almost a year?
End date on that chat suspension coincides with the suspension length of the site suspension on Meta SE for this user. If I were to guess, the long chat suspension was applied after reparenting the chat profile to Meta SE. There's no easy way to track such things, but I suspect the long chat suspension is now a case of 'burn your butt, sit on the blisters'.
awarded