Dynamic shadows disappear near from other meshes

Hi there,
I’ve got a movable mesh that casts shadows from 3 movable pointlights, but it’s dynamic shadows seems to disappeaur when the mesh is near from another one.
I’ve set scalability to Cinematic, tried with either 1, 2 or 3 pointlights, the result is the same. Both material and mesh are two-sided.

See attached pic, the mesh with normal shadows at a certain distance from the ground scene, and the same mesh less far from the ground.

I’ve resolved the issue by setting “Shadow Resolution Scale” up to 5 (instead of 1) and forcing the scalability setting on beginplay by launching the command “Scalability 4”.