issue on private mode browsers

Hi there,

since I purchased the pro license something bizarre is happening…
Using private mode on both Chrome(74.0.3729.131) and Firefox (66.0.5) I’m not able to load the site completely, there is always something missing like images, icons, text or links.
This happens only on incognito mode.
However, if I uncheck “Cache System” everything goes back to business as usual.
Not that it affects 98% of the visitors but I believe it is an issue to be addressed.
Any clue?

apart from this, the plugin is great.

Angelo

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