Created attachment 425245 [details] Snapshot-example When trying to add the icon to home screen, clicking "Share" button, the snapshot of the web will turn into the app icon if website has the specific icon, if don't, Safari will make the app icon as the website snapshot. The problem is, when adding to home screen, it needs time to turn into the app icon. User may add the incorrect snapshot instead of the correct app icon.
I believe the fix for this issue would be outside of WebKit. Please file feedback via feedbackassistant.apple.com