The tree is from the Kite Open World pack.
I had some difficulty with lighting before and for the most part think I resolved it.
Warnings I get in the output log that seem they could be related:
These are in yellow:
LightingResults:Warning: Warning InstancedFoliageActor_2 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
LightingResults:Warning: Warning InstancedFoliageActor_2 Instanced meshes don’t yet support unique static lighting for each LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.
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This is in red:
MapCheck:Error: Error WorldSettings_1 Maps need lighting rebuilt