Windows are flickering while resizing with Direct3D12 Graphics APIs.

Steps to repro:
1. Create a new project.
2. File > Build Settings > Player Settings > Other Settings.
3. Uncheck Auto Graphics API for windows checkbox.
4. Assign Direct3D12 graphics APIs from the list.
5. Drag any window to resize.

Actual Result:
Windows are flickering while resizing.

Expected Result:
No graphical glitch while resizing the window.

Reproducible in:
2020.1.0a9, 2019.3.0b7, 2019.2.0f2, 2017.4.27f1, 2017.3.0a4.

Working Fine:
2017.3.0a3.

Environment:
Only on Windows 10.