I spoke with surprise. about this and he admits that he only went AFK for a second but that's doesn't justify his actions but you also didn't get to talk to him first.
You should have talked to him first about what he did considering you were the victim here but you didn't and went straight to report him which is not a good move going like that reporting Blackouts members without talking first.
Since this was his first time and hopefully the last, I will only warn him and hope he doesn't repeat it again.