Issue using ProGrids

I have ProGrids as well as ProBuilder installed on all of my projects, but I continuously run into an error while using ProGrids.

I have Googled the issue and cannot seem to find anything related to the subject.

My issue:

When opening ProGrids, a window opens up in the editor displaying the config for ProGrids. After having ProGrids open for a period of time, and sometimes very quickly, the application will glitch and automatically open a second ProGrids tab and sometimes many more. (It duplicates it in the editor so that I have multiple ProGrids open at the same time). This creates a lag on the editor due to the duplicated ProGrid windows being opened.

When I try to close one of them, I am unable to close all of them. I can exit out of only a single instance of ProGrids, but I am unable to exit out of the duplicated windows.

The only solution is restarting the entire project.

I literally have no idea why it is doing this and cannot find a cause. It seems to happen randomly after opening ProGrids.

ProGrids is by far one of the more helpful tools offered in the Package Manager and I would love to figure out how to solve this!

Thanks =D

Edit:
Will provide screenshot the next time the glitch occurs.

 

These are the screenshots.

If you look at them, you'll notice multiple ProGrids are open.

I close one of them and they are still open and the Unity Editor doesn't recognize them as open.

 

Dropping a reply here just to let you know that you're not alone out there I have the same issue and it's slowly driving me insane (among other issues...).