Model Builder GP tools showing black box

[HassanMahmoud_el07]

Hello Everyone, 

I'm facing an issue with Model Builder. once I click on any of the tools, I see a black box. I need to double click to maximize the tool but I cannot resize the GP tool window box.

I tried uninstalling and installing again ArcGIS Pro and the issue is still shown.

[DuncanHornby]

Have you tried updating the graphic drivers on your PC, especially if you have reinstalled ArcPro and nothing has changed?

[HassanMahmoud_el07]

Updating to the new version 3.1.3 solved the problem.