Favicon bug, don't know if it's cockpit or vivaldi

Have you checked in other browsers?
What is this local version running on?
Is this a docker container or a local install?
Which version are you using?

Do you have any steps that allow reproducing this issue confidently on another system?

Why did you think a screenshot without any details but a vague title was the proper way to share your findings?

latest version, works in vivaldi mobile and firefox linux, bug happened after i updated to the latest version recently, installed local with “sudo apt install cockpit -y”
steps to reproduce : use the current latest vivaldi stable version, i do not know if this is only on vivaldi linux or vivaldi desktop entirely

Network tab, preview

Network tab

Sources tab
Screenshot_20211021_185528

HTML
Screenshot_20211021_185318

working on Vivaldi mobile android, on Android 11

As long as it is working in one other browser it definitely is not a Cockpit bug.
So I’d guess it is a Vivaldi thing.