If you want to add one or more droplet, better add an Empty at the system root as in the picture, and change the “copy rotation” constraint “mix” parameter to Offset(Legacy).
I’ve noticed also… (shame on me) some problems on the first Empty constraint “shrinkwrap”
i was using “Nearest surface point” as Mode, it gives some laggy effect in the animation.
we have got to switch it to " Target Normal Project":
and here we go Eggain:
File Updated in previous post.