Hey @cstone2563! Welcome to the forums!
I couldn’t tell you how to fix this, others might be able to but I have limited experience altering terrain assets… What I can tell you is it looks like the mesh collision baking issue. I would either contact the creator on FAB, or you could check out this thread and see if their latest solution works for you! 
How do you regenerate the Landscape Collision, as its not matching the terrain - #27 by BAWJA
Hope that helps!