Bad optimization in xbox series s

Why? They lower the fps in 60 fps option, they go down very constant to 45 fps 60/45 60/45 in a 60 hz monitor, it is very annoying, I have the xbox series s and I keep waiting for an update to fix it, I already tried everything , restart, reinstall the game, it’s internal, change the monitor, I don’t know what to do anymore, and I don’t think it’s the console because the other improved games run very well for me.