Resolved
It was back to normal after uninstalling “AnyDesk”
The system I am using is Fedora 40, and I have some extensions enabled. There is an area in the top-right corner of the screen that does not respond to any clicks (however, if I drag the mouse from a clickable area to this location, it works). As indicated by the red box in the image, any part of any application within this area is unclickable. When I want to click on something in this area, I have to resize and move the window to another location to click. I suspect it might be caused by an extension, but the problem persists even after disabling all extensions.
I hope someone can help me resolve this issue. Thank you.
Additionally, I just noticed that when I switched applications using “Alt+Tab”, a black block appeared in the top-right corner for the first time, which is almost in the same position as the non-responsive area. I suspect this black block may be related to the clicking issue. The attached image was captured from a video I took with my phone, showing the black block.