Every voluntary movement of the body is intentional, by definition. If that movement causes accidental contact, or even if the contact was intentional but not intended for a specific area, then it's accidental. That's how I'd interpret the rule because it was clearly written to prevent people from taking cheap shots, which this wasn't.

I don't know whether its the refs who are interpreting it wrong, or whether they were told to interpret it that way. But either way, I think it's the wrong call and should be fixed, either by clarifying the rule or by training refs to interpret it correctly.