When attempting to play the GDC_Landscape_01 map in Editor or as Standalone Game, game plays with very low FPS ~ 3-10 on machines that should be able to handle 30+.
While testing for regression, ran into an issue in 4.14 where project would freeze entirely upon PIE or as Standalone Game.
Result: Game plays with very low FPS
Expected Result: Game plays with ~30+ FPS
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-42748 in the post.