Having the same problem and I’m in the middle of a building. There is a lot of geometry around. Distance field settings and Lumen settings should be okay. I tried lighting everything with an emissive dome and that works just fine. It’s the skylight not being blocked that’s causing the problem. Using the sun sky actor for my scene. I think with Lumen we could finally get “real” HDRI like lighting but the way the skylight works is causing a lot of problems for me.