I don’t know, why browser cache clearing wasn’t working. Did you choose the third option here? (Directly translated from german it says: “Cache clear and hard reload”)
Try these steps to fix your favicon issue in Webflow: (1) Ensure you’ve uploaded the correct favicon in Site Settings > General and clicked Save before publishing. (2) Clear your browser cache or open the site in an incognito window to check for updates. (3) Verify that all pages reference the correct favicon by checking the Custom Code section for conflicting favicon links. (4) If issues persist, try re-uploading the favicon with a new filename to prevent caching conflicts. If the favicon updates fine on the staging URL but not on the live site, it may be a CDN caching delay—wait a bit or force-refresh using Ctrl + Shift + R (Windows) / Cmd + Shift + R (Mac). Let me know if this help.