Didn’t this only happened if you tried to run both games at the same time, which realistically should never be happening. The only time this might trigger is if one anti-cheat misses or drops the command to close for whatever reason and keeps running while the game is closed and you go to play the other game instead.

Both anti-cheats could just whitelist each other. Anti-cheats already have software whitelists, there is no reason they can’t add each other and it automatically solves the problem without the consumer or developer needing to do anything other than update their software to the newest version.