Shadow draw issue

Hi, i have a very annoying problem with my shadows.

For information, i’m using:

  • 1 stationary spotlight
  • moveable static mesh
  • floor bsp -> Lightmap Resolution = 2
  • light is builded

The problem:

A video says more than 10000000 words:

Its wierd, because this only happens with my own meshes. Any ideas what’s causing this shadow draw issue?