UE4 triangle shadows bug

This happends in UE 4.14, I just run some older version (4.10) and there wasn’t any problem.

Some time ago I found some info that it is connected to normals and it is UE4 bug. What is the priority of fixing this bug? Or maybe I misunderstood something?

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It’s completely a shadow issue. You can either play with the shadow settings (shadow bias), or use more geometry. Either option will get rig of the artifacts.

Im having the same issue. have you fixed this problem?