I’ve posted it in detail in answer hub. Thanks for your consideration.
Project Settings >> User Interface >> RenderFocusRule (Set To) Never
This is available from 4.8 and onwards. See: A new, community-hosted Unreal Engine Wiki - Announcements and Releases - Unreal Engine Forums
Holy **** - thank you! I had no idea. It’s been bugging me for ages.
If you answer to the answer hub I will mark it as answered (aka. thanks and you deserve the karma)