I do not really know whether this issue belongs in the iOS forum or the Android one, but I will start here.
I often send my wife links to web pages with interesting articles (the problem seems most common when those articles are from the NZ Herald but it isn't limited to that site). Later in her day she will open the link and get "Oops - that page no longer exists" or similar. However if you go to the site, the article in question does indeed still exist and the links work fine if she opens them on an iMac or iPad.
Any ideas what is going on?