I placed a SM + light, selected both → Harvest BP (the tooltip of Harvest said “Not possible…” by the way while it worked fine) and the result was this - it rotated it. Was able to reproduce with different meshes + lights.
After manually trying to change the location and rotation of the mesh in BP components, I ended up with a different placement in BP components vs how it looked in the level somehow. Notice position of the light in both shots, as reference.
Also the name it gave it gave the light automatically was: PointLightStationary_PointLightStatic_PointLightStationary_PointLightStatic_ PointLightStationary_PointLightMovable_SpotLightStationary_PointLightStationary_PointLightStatic_ SpotLightMovable_PointLightMovable_PointLightStatic_PointLightStationary