So too add to the thousands of lighting errors that people have added on here, I was wondering if anyone has an easy fix to my problem here. This happens on a few of my meshes and I have no idea why. There is a weird black shadow on more than half of the mesh, I thought it might of been caused by the occlusion map so unplugged it and still no luck.
Any help would be greatly appreciated 
Bad uv’s are the no.1 cause of bad lightmaps. Without any other information to go one that is what it looks like from here.
Your lighting needs to be built-since it has the Preview marker there. If you have issues then it’s likely due to overlapping or low lightmap resolution.
The problem has previously still occurred after each time I rebuild the lighting. The UV are layer out and have a decent amount of padding between them. For this particular scene I have an atlas texture for about 8 meshes.
it might be low lightmap resolution or overlapping uv, you can check your uv in the mesh properties in content brower,
The light map resolution is 64 but when I tried much higher there was no change. The UVs are not overlapping either.
would u mind to screenshot the lightmap UV for us for better look?
Sorry for the delay, this is the lightmap UV
Fixed it with a sphere reflection capture
Your UV’s could be better too–for that mesh you only need one seam down the length and it will unwrap perfectly, like how you would unwrap a cylinder.
never though its reflection issue, but good for you that you fix it 