Did it ever happen to you that you were unable to click your applications windows, that they were visible but clicking Left / right do not touch the window you see but more as if you were clicking the Desktop ? As if they weren't there...
That's a pager setting. It shows another desktop application almost "real-size" but it's only a preview. You have to click the desktop in the pager to activate it.
I've no idea where that comes from but I've seen it too ..... sometimes. I wouldn't mind having that "all the time" but as it is, it puts me on the wrong foot too.
yep me too, seems a focus small issue of the destkop, you can solve it with "alt + tab" to switch windows in order to trigger the focus callbacks, or even a restart of the DE (without reboot) with "ctrl + alt + end"