Trees changing shape in distance

Hey guys, I just recently started to use and learn to work with UE4 and I found a problem I cant seem to solve. As you see on the picture my tree meshes somehow disolve in distance. Why is this? And can I somehow make them look normal? Thx. {Heres my pc specs if it could be related> 5820K, GTX980, 16GB Ram}

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Click on the mesh, change the lod settings from Auto to Lod 0

EDIT:

My bad!
Click on the tree mesh, then go to LoD Settings and change the number of Lods to 1.
Cheers!.