What fixed it for me was reverting my RTX 2070 Nvidia graphics card driver to 457.09 OR making sure the project was running in DX 12 if you rather not revert you graphics card driver. Hope this helps! 
What fixed it for me was reverting my RTX 2070 Nvidia graphics card driver to 457.09 OR making sure the project was running in DX 12 if you rather not revert you graphics card driver. Hope this helps!