"Self-Shadowing" on Tessellated ground broken from 4.18 to 4.21?

While going from 4.18 to 4.21 the self-shadowing on my snowy deformed ground stopped working for point lights.
4.18:

__4.21: __

4.21: Directional and spotlight works. point (and rect) doesn’t

Is there a simple setting I’ve forgot somewhere? Cast shadows is on for all lights. They are set to movable. Is point lights not the best type of lights to use?

I’ve searched for clues and the closest I’ve found is this, but there’s no mention of point lights in there even:

It’s not quite the same material - I got the snow trails blueprints from the marketplace to replace my own solution made in 4.18, but even so, it shouldn’t matter since the spotlights seem to work still.

Any other recommendations for settings in this use-case would also be appreciated!

I am also having this issue! Plain white material with displacement doesn’t receive point light shadows, but the spotlights work just fine. At first I thought it was because I was using subsurf, as that is a listed limitation, but it seems to be broken for default lit materials as well.