HammUEr, a Hammer/Worldcraft map importer for Unreal Engine

Hey , i am having a issue with using 4.11 with HammUEr, after importing the shadows are not working correctly, even if you change the light settings or rebake.

Any idea what causes this? In 4.10 shadows were sharp and fully working while in 4.11 no real shadow is shown and it seems all lightmaps are broken?