I'm hiring heavily atm, and one obvious thing I look at is what degree the person has. I've noticed that I've started to go "oh, they did that course. We had person Y from that course and they were bad".
It's such a subconscious thing on such a non-obvious attribution that it made me even more aware of how people make racist assumptions because they group on the color characteristic and project from sparse examples.
I don't know what the solution is, but it would be a good thing if someone could come up with a solution.