I've not seen that "predict future motion of object behind obstruction" actually work yet, perhaps DJI hasn't enabled it for production firmware/software yet?
Tried it with the drone tracking just me, me on a bright yellow, very "contrasty" quad bike and me in a white ute, all against dark backgrounds. Each and every time the drone would display the blue ? mark where I disappeared, but made no attempt to keep panning through my extrapolated trajectory....
Having said that, when the drone can see me, the tracking has been stellar, especially in the profile submode. Can't speak for the mavic 1, but it's leagues ahead of the original
P4 in both smoothness and tracking speed.