15 minute cooldown on "/afk <message>" (disabled command)

This is a weird one. The command "/afk TestMessage" seems to be disabled, yet it has a 15 minute cooldown. "You cannot type that command for 1 minute 54 seconds." I don't see any reason for this command to have such a cooldown (even if it WAS enabled). I'm wondering if this is some other command cooldown falsely triggering