Weird Triangulation when baking Normal Map

Hello, I'm having very odd triangulation issues when exporting normals maps from Substance Painter. 

After making my materials in Painter and transferring to Marmoset, I'm seeing some odd normal map triangulation that wasn't present in Painter. The issues also seem to be in the baked Normal Map as well. I've tried importing into marmoset Mikk space and flipping the Y normal map channel, but the issue persists.

Fwiw I'm following Simon Fuch's Military Radio tutorial extermely closely and he wasn't having these issues. 

I'd like to get the model looking in marmoset like it does in Painter. I've spent hours trying to debug this with no success, so any help is appreciated!