Editor crashes on changing Graphics APIs to Direct3D12 with X86_64 Architecture.

Steps to repro:
1. Create a new Project.
2. File > Build Settings > Change Architecture to X86_64.
3. Player Settings > Other Settings > Uncheck Auto Graphics APIs for Windows.
4. Add Direct3D12 Graphic APIs > Move to the top of the list.
5. Click on Restart the Editor.

Actual Result:
Editor crashes on changing Graphics APIs to Direct3D12.

Expected Result:
Editor should be restarted.

Reproducible on:
2020.1.0a6, 2019.3.0b5, 2019.2.0f1, 2019.1.0f1, 2018.3.0f2.

NOTE:
- Unable to open that Project again.
- Crash occurs only on AMD Radeon R9 200 Series.
- For reference DxDiag.txt file is attached.

Environment:
Only on Windows 10.