Hello, I have this weird problem that started a few days back. I reinstalled Solus 4.1 (upgraded the PC) last Friday (July 10th) and everything was going fine until Tuesday, when I first noticed it.
Somehow, there is an area in the screen that becomes "unclickable" (Don't know how to call it). The mouse won't interact with anything there, no right/left click, no scroll, no menus, no selection of objects, no drag-n-drop ( I tried to drag an icon of the desktop into that area).
I have attached a screen capture to show you the approximate area of where it happens. Note that it also affects a portion of the items in the menu-bar.

It seems to be like a layer that stays on top of everything. However, it will not affect the Budgie Menu because it stays on top level. So, I can click everywhere on it, drag or scroll in the menu over that "dead area" and it is not affected at all.
I haven't find a solution yet, but if I close the session and log in again, the problem is gone. Buuut... It could happen again, but not always.
Although I wasn't able to identify what may have trigger it yet, I’ve noticed there is one element that seems to be on top of everything (except the Budgie menu, of course) and it's the area for the notification messages, which happens to be in that corner.
Does anyone else had this problem (or similar) before? It may be really annoying after a while.
Please, let me know if you need further details that I can provide.