In ES3.1 preview mode，using movable direction light, When u facing the light source, at some angle, shadow will disappear.
Under the same circumstances,In SM5 mode, The shadow is visible.
why？
in the top left corner, both images seem to have toggled on 3.1 preview,.
nevertheless, you shouldn’t use movable skylights in 3.1 devices since its performance heavy. In the project settings, you can toggle on/off the support for movable sky lights