Many sites have backend code that works similarly to ad trackers.
Online shopping sites, for example, track your moves so retailers can see how customers behave.
Unfortunately, when you block that throw in of content, it can break the site entirely.
Other sites had problems when users tried to add items to their cart.
After testing a few sites, it seems this particular issue has been fixed already.
Often, thatll solve the problem instantaneously.
On iOS 9, you could long-press the Refresh button to view a page without ad blockers.