@Deathrey Unreal Engine Issues and Bug Tracker (UE-89413) The rendered result is correct (I tested myself), however the unlit mode is currently wrong.
Also: After testing all Fresnels of the 1 - 1.78 IOR range at the beginning of this year I must say fresnels from IORs 1.3 - 1.78 are good and from 1.3 to 1.0 it gets worse and worse.