Slides appear only on the left

[tabtape]

Hi everyone.
Does anyone know why this happens?
There are three slides but only two appear and on the left. The third appears only when I click on the right arrow. If I keep clicking, the images scroll but then an empty slide always appears.

In the code there is the transform:translate3d property which seems to have automatically moved everything to the left. It's a property that I can't change. If I apply the "important!" everything stops.

I just added the images and set the javascript... did I make a mistake there? but I don't understand what would need to be set to get a working slider.

How can I solve it?

There is already a discussion about this problem ( #2318 (comment) ) but the solution is not clear, or rather it has not really been reported.

Thank you.