In my case at least, (for support calls) it's not a "racist filter", it's that I sometimes simply cannot understand what they are saying.

I had a contractor group come highly recommended, but I literally had to focus so hard on each word that I couldn’t make it work. I don’t know where they were from but I heard easier to understand accents in Delhi.

I realized quickly how it was changing my thinking process to devote so much to each word.