Not sure if this is a bug, I noticed there's a delay from the time you touch/ swipe the screen to the time it registers your input.
I noticed a while back that there seems to be a delay from the time I issue a command to the time it gets registered on-screen, so I made this slow-motion (960FPS) video to demonstrate the behavior.
Notice there's a gap from the time my finger hits the screen, to the time the blue cursor starts moving, to the time the yellow target shows up.
Device: realme 6