I have heard about this, in fact there was a thread here on FR I read just yesterday alleging exactly what you state (minorities are rubber stamped while white are severely scrutinized even with same/similar inputs during the application process).
It’s actually a FACT. I have two children (now grown and productive) I was married twice and divorced twice. One child from each father. My son happens to be bi-racial—my daughter is white. There was a time when I qualified for reduced price school lunch. EXACT same info on EACH of my children’s applications. My son’s app was NEVER questioned—went sailing through with no issues. My daughter, however was audited EVERY.SINGLE.TIME. I asked about this and got “blank stares” over the phone and an “uh oh, she’s on to us and the system” type voice.