Favicon on Chat.SE with "default" host does not show the number intermittently due to CORS

[andrew-tc]

The favicon on chat rooms hosted on SE sites (e.g. Android.SE, Anime.SE, etc.) shows the number correctly, but not for chat rooms with the "default" host that only shows the SE logo.

The original link is

https://cdn.sstatic.net/stackexchange/img/favicon.ico?v=dc

which is available, but not matched on the existing CORS trick

https://cdn.sstatic.net/Sites/*/favicon.ico*

missing /Sites in the path.

There is also

https://cdn.sstatic.net/Sites/stackexchange/img/favicon.ico?v=dc

which is 32x32 compared to 16x16 from the original link.

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There are 2 possible solutions:

1. Add a new pattern for CORS trick
2. Manipulate the link to use the one with /Sites in the path and use the existing pattern for CORS trick

[g3rv4]

do you have a site where I can reproduce this?

[andrew-tc]

Apparently chat rooms hosted on "The Stack Exchange Network", listed on https://chat.stackexchange.com/?tab=site&sort=active&host=*

Testing can be done on Charcoal HQ since it's a quite active chat room with a bot.