there is the trope in slasher/ action movies that the one black character will get killed off early as a way to increase the stakes for the rest of the characters but its not exactly that prevalent any more from everything ive seen lately, I dont think it was ever a concious decision besides this happened in some films i like I'll follow everything they did, and most of the films ive seen it in werent exactly blockbusters.
It's mostly the kinda thing where they think if there are a couple of black characters who die, then every white person should also die because racial equality or something.