If you are on a Fiji-based or earlier GPU still getting updates from AMD, you may be experiencing crashes on start up.
Unreal Engine is exiting due to D3D device being lost.
(Error: 0x887A0006 - ‘HUNG’)
This is likely due to conflict within the code pertaining to Polaris, and UE4 is freaking out. To fix it, download AMD Crimson driver 16.11.5.
Happy gaming!