Windows Forms freezes Unity game

I have implemented Windows Forms in my game. But when I open up any form, the Unity game freezes, and any command I run from the Windows Forms does not execute until the form is closed. Even if I focus on the Unity window, it is still frozen. I also have RunInBackground set to true. Any workarounds guys?

I would like to know the answer to this question as well. I’m trying to use windows forms DLL library file but when I instantiate a new windows forms, the game freezes in the background.