Did a bit of digging and this is the commit that seems to be causing the issues https://github.com/EpicGames/UnrealEngine/commit/a48e767b94415ead8e27e6a02060104dc6d8993a
Edit: Well or this one: https://github.com/EpicGames/UnrealEngine/commit/55cc21d08fe138fd9403d9bcca6c1092203010bf#diff-18dd8aa60b107be8dd6f6a28cc45c099