DirectX 12 / DX12 problem

Starting the game with DX12 takes maybe 10 minutes. However, it DOES start if you don’t lose patience.
And when it starts, it’s running noticably faster than DX11.

So, could Gearbox please fix this?
I know I’m not alone with that problem. Haven’t found a working solution either.

CPU: Core i5-4690K
GFX: GeForce GTX 1070
RAM: 16GB
OS: Win10 v1903 (Build 18362.418

Moved to the PC section.

I also experience this exact issue on my 2700X and Vega 56, and a quick Google shows it’s really widespread - so it’s definitely not a driver or hardware issue.