Unfortunetly the inline svg's used on "Page Icon" links doesn't work well on mobile browsers based on chrome (I've tried chrome and DuckDuckGo). Here's screenshot from DuckDuckGo:

image

it's from my site https://twomasc.dk

I've added a twitter link in the page to demonstrate that the icon works fine, when it's a regular img file reference.

I haven't had a chance to test it, but a adding a xmlns:xlink="http://www.w3.org/1999/xlink" type may fix it from what I've been finding... https://stackoverflow.com/questions/41507360/svg-inlined-in-html-not-displayed-correctly-by-chrome

But I would rather suggest switching to use a file reference.. like the other links