If you have planets larger than 120km, you might get some light bleed before dawn and after sunset.

These are simple mods to "fix" this by increasing ShadowCascadeZOffset.
This comes with a trade-off of worsening shadows in detailed areas. 2x is barely noticable, 3x starts showing some signs, 4x has no feet for character shadows, 10x removes about a half-small-block of shadows.

Please pick a version that is the same or larger than your maximum planet size.