Can't clear website data from Safari
I can't seem to clear website data, browsing history and cookie from iPad Air 2 and iPhone 7+ . I've tried going through settings>safari>clear history and website, settings>safari>advanced>website data>remove all website data (and individually through edit). I've given it time but they are not clearing. This did not used to be the case prior to iOS 10.3.2. How can this be resolved?
Thanks!
iPhone 7 Plus, iOS 10.3.2, iPad Air 2