Work that involves in-person meetings with customers who are known to not like minorities. (If they're paid on commission, this will happen even without the employer actively deciding anything.)

If that particular minority is strongly correlated to cultural values that clash strongly with the organizational culture. (And said values clash would likely result in slower career progression even if the minority status is deliberately ignored.)

There exist conceivable situations where minority (or other protected) status could actually directly affect job performance, or be correlated to something that affects job performance.