SpeedTree 8 Light Map Problems

So Ive been having trouble some time now with Speedtree 7 and 4.19. Every time I change the LOD the Mesh brakes. Its goes from this

to this

So I switched to Speedtree 8 and it fixed the problem. But now my light maps are breaking and looking like this

I used Export UE4 option in SPT8 but it does this for every tree. Anyone got any suggestions?

I can’t tell which channel you’re showing in your image, but Lightmap UVs are stored in UV Channel 1.

You are using SpeedTree for UE4, correct, and exporting the .st file?