Interesting. I will try to switch to a Windows machine to test, but I haven’t seen any other reports like this.
I wonder if Edge’s security settings are blocking something.
If you go to Edge’s Settings → Privacy, search, and services, and find the “Enhance your security on the web” section (NOT the “Tracking prevention” section), and turn OFF “Advanced security mode”, is there any difference in behavior?
If that fixes it, you could turn it back on and add fab.com domains to the Exceptions list.