After a certain period of time (a day?), a pinned icon loses it favicon and becomes a generic globe icon. Sadly, This appears to happen as time passes a certain amount of time. I am guessing it is a day or so.
I apologize that I cannot provide more detail on how much time passes, so I know I am not being very helpful here.
There is nothing overt that I do to cause this except perhaps not visiting these sites often enough.
In my view, I think the favicon should always display and the generic icon should never display.
I am happy to provide more detail if you can point to something to capture.
Thanks team!!
Version 0.99.132-rc (WebKit 621.1.2.111.4)
Sequoia (15)