Weird pill shaped icon in the dock I have noticed a pill shaped object in my dock. When moving the doc it stays in the same place.

Restarting didn't resolve the issue.

Does anyone have an idea what this object might be and how I can get rid of it?
I saw this under the Downloads folder and later it moved under trash.


In Safari, downloads list, hit "clear".
In trash, select all .download files ( kind: "Safari Downloads") and right click > "delete immediately".
In Terminal, run 

killall Dock