Reference the web data not deleting. I started a new thread, because I searched, and the forum indicated nothing found. I have researched this for a fix. It was stated Apple is aware of this, and is working on a fix. Others have gone to the Genius Bar, and no fix. Total reset to factory settings fixed it for others, but it soon came back. One site statement stated their "IT" people called it a vulnerability, and were looking to replace the iPhones. Some stated it has been a problem since iOS9. It was stated it is due to "super cookies" Apple fix that in the last update 10.3.2. The bottom line, it is still a problem. It showed a website ..........com 0 bytes, and no matter what you try, will not delete. If by chance it does, if you visit that site again, it comes back. The weird thing, it is not always the same site. iMore.com does not do it on my iPhone 6S. Others have stated that little by little, other sites are starting to show up with the same issue 0 bytes, will not delete. I agree with others, even tho it says 0 bytes, something has to be there in the background. Is it harmless, or the potential for security problems?