Items keep dragged / in focus

Hey,

THANKS a lot for your nice plugin!!

I have a strange problem occurring with the slider.

Once I grab an item with the mouse arrow, it always stays focused / dragged, even if i click somewhere else or move the mouse out of the slider. Searched for hours now, but can’t find the reason. Can you please help me?

Problem can be seen at https://www.traveloptimizer.de –> Scroll down to “Unsere Travel-Gadgets*”

The page I need help with: [log in to see the link]