Drag and drop issue HTML5 preview & publish (bug?)

Hello,

i don't know if that's a bug or if i am missing some options, but i have a *weird* behaviour when building a drag and drop in Captivate 9(latest version).

So here what i build: (1) I have a drag and drop slide. 2 sources and 2 targets. (2) Only one of the target is accepted, for each of them. (3) I send the sources back to original position if it is the wrong target. (See the images for clearer understanding.)

(1) (2)

(3)

And here what's going wrong:

Now when i preview it in HTML5 and i drag the source to the wrong target, it snaps back, and if i try to drag it again very quick i can't grab it. But if i wait 1 or 2 seconds it will work! The weird thing is, if i drag it somewhere else (anywhere except the targets) and try to grab it again very quick, i can grab it instant!

I used simple smartshapes, but the same goes for images.

So, i looked up the elements in my console but it seems that i can't figure it out why that's happening. My colleague has the same behaviour with his Captivate.
I tried it in every major browser. Always the same.

So is someone else having this problem? If you have some free time please check, if you can replicate that issue.

I think it's annoying for our costumers and users....

Thanks in regard!