I also have the bug A with broken Enums and B with enum select node content not properly displayed in 4.15 release ( B seems to still function) A may cause breaking related widget layouts (Action RPG Inventory). Upgraded from 4.14.3, can not reproduce, issue surfaced shortly after upgrading.
Possible related log error: ‘/Game/Assets/OldVillage/Meshes/Structure/Enumerators/BP_Fence_Enum.BP_Fence_Enum’ was upgraded to use FText to store its display name data. Please re-save this asset to avoid issues with localization and determinstic cooking.
However, enum content is still properly displayed in the editor upon opening enums.