Hey guys, this was only little attention to a little problem, I wasn't going to begin such discussion
To your problems. Yes, I think this could cause switching from full-screen applications.
Just turning off the popups of course solves the problem, but that's not the thing, since I've turned on this feature because I find it usefull, so it would be better to correct the problem. The more because I really think this didn't happened before.
I know if it has something to do with it - most probably not, but since version .137, the contact which goes online remains on the desktop in non-translucent state...