Some web page icons in wkwebview on IOS 14.2 are replaced by squares

Some page icons missed, our mobile app is showing some web page in wkwebview. after upgrade to iOS 14.2 the icons missed and the square replace before position. Before iOS system these icons showing correct. Any suggest for our app?

I am having a same issue where font awesome icons appear as text
I met the same question,and i found it maybe related to the function calling ---- "window.webkit.messageHandlers.CustomName.postMessages", if i deleted those methods, it maybe becomes correct。 it really confused!

sometimes we delete some common JavaScript, it can become correct too! SAD !!!!!
Some web page icons in wkwebview on IOS 14.2 are replaced by squares
 
 
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