problem with clicking on menus in editor

I’ve been having a very frustrating problem with the editor recently. this doesn’t happen 100% of the time, but it seems to happen more often when I have larger levels open in the editor.

When I try to click on things (ie drop down menus or right clicking for the context menu in the blueprint editor) it won’t do anything besides change the color of the bar on the top of the editor’s window (see attached pictures). I apologize that this is a very vague. I truly don’t know how to fix it reliably. however, I’ve found that when I close everything in frustration and come back a few days later, the problem isn’t always there.

please help… thank you!