I'm having difficulty getting an apple touch icon to work consistently on some devices.
The devices with issues are typically iPhones and I believe they are 6S's. My icons are setup like this:
<link rel="icon" sizes="180x180" href="/SiteAssets/LandingTouchIcons/apple-touch-icon-180x180.png" />
<link rel="apple-touch-icon" href="/SiteAssets/LandingTouchIcons/apple-touch-icon-180x180.png" />
<link rel="apple-touch-icon" sizes="180x180" href="/SiteAssets/LandingTouchIcons/apple-touch-icon-180x180.png" />
<link rel="apple-touch-icon" sizes="152x152" href="/SiteAssets/LandingTouchIcons/apple-touch-icon-152x152.png" />
<link rel="apple-touch-icon" sizes="114x114" href="/SiteAssets/LandingTouchIcons/apple-touch-icon-114x114.png" />
<link rel="apple-touch-icon" sizes="72x72" href="/SiteAssets/LandingTouchIcons/apple-touch-icon-72x72.png" />
<link rel="apple-touch-icon" sizes="144x144" href="/SiteAssets/LandingTouchIcons/apple-touch-icon-144x144.png" />
<link rel="apple-touch-icon" sizes="60x60" href="/SiteAssets/LandingTouchIcons/apple-touch-icon-60x60.png" />
<link rel="apple-touch-icon" sizes="120x120" href="/SiteAssets/LandingTouchIcons/apple-touch-icon-120x120.png" />
<link rel="apple-touch-icon" sizes="76x76" href="/SiteAssets/LandingTouchIcons/apple-touch-icon-76x76.png" />
<link rel="apple-touch-icon" sizes="57x57" href="/SiteAssets/LandingTouchIcons/apple-touch-icon-57x57.png" />
I was given an iPhone 6S to test with since I couldn't reproduce the issue on my android devices. I was able to duplicate the issue so I added this line from above:
<link rel="apple-touch-icon" href="/SiteAssets/LandingTouchIcons/apple-touch-icon-180x180.png" />
When I refreshed the browser on my test device, the icons began displaying when adding to the home screen.
I just tried again on another iPhone that had never visited the site and it's not working.
This is on a "SharePoint Online/O365" site. Ideas on what could be causing this madness?