Colleague queued up for cloakroom at work event and handed their ticket to the person they presumed was the attendant. Turns out this person was a fellow party guest and they also are black. Colleague is concerned that this could be seen as a racist incident (eg him presuming that the the cloakroom attendant is black and therefore assuming that said person was cloakroom attendant)… I’m confused. Is there unconscious bias here?