UV Mapping Problem

Hey community,

My following problem:

I just unwrappen a wall mesh in blender for both uv and lightmap (included photos below):

Eventhough they seem to be unwrapped properly (no overlapping, nice margin between all faces etc.), when baking the scene I get some weird resultsā€¦ :frowning:

PS.: I also set the lightmap resolution within unreal to 128 which what I heard so far is propably even too high for such a simple mesh! (But it changed nothing at all)

PLS HELP ME! A BIG THANK YOU IN ADVANCE!! :smiley: