Hi all! I did an upgrade last week of my Fedora 28 box and got Plasma 5.13.3. I noticed a new feature that is, when I hover with the mouse over the launcher icon it changes for 1 second to another thing, then it changes back to the launcher icon. It is very fast and it happens when I traverse the boundary of the icon, so it is very fast and I'm not able to see what it is. It seems to me that is something like the desktop wallpaper minimized to the size of the icon or something like that. I was gogleeing for this issue but to no avail.

Perhaps is something related to the "Activities" feature, which I don't use. The issue does not make any problem for me, but I'm just curious about what it means or for what it may serve. The issue also happens sometimes with the icons in the Task Manager.

I tried to do a screen capture but I'm not able to capture the instant when the icon changes.

TIA, Mario