Caching problem W3 Total Cache and Thrive Leads

Hi, I install Thrive Leads and W3 total cache.

I use a lightbox and also a ribbon. If i don’t use “Lazy Loading” option, the form appears every time, also if i set “Every 7 days”. (this problem is present only in some browser)

If i use “Lazy Loading” option, the form works well, it appears only one time. But after a certain period of time, i try a private session on another PC and it does not appear ever again, not once.

If i purge the cache from w3 total cache, it works well again, but only for a certain period of time. Then it does not appear ever again as said before

How can i resolve this problem?

Thanks