Is Web Share API broken on Chrome + Windows 8.1?

My code is similar to many examples on the web, including MDN code at https://mdn.github.io/dom-examples/web-share/

      btn.addEventListener('click', () => {
        navigator.share(shareData)
          .then(() =>
            console.log('MDN shared successfully');
          )
          .catch((e) =>
            console.error('Error: ' + e);
          )
      });

Issue:

navigator.share returns a promise supposed to fail if sharing is denied. In my case it does so, but after several seconds of delay. My main problem is this delay: I can fallback if I know sharing API is failing, except here I need to wait for an unknown amount of time before the error.

Mode details:

• The error is "Error: AbortError: Share canceled"
• I did not cancel anything (I see no UI before the error happens). Maybe Windows denied something without displaying any message.
• I am using Windows 8.1 Pro, this could be related.
• Same problem for me with Chrome 90.0.4430.93 (and previous version 89.0.4389.128), but also with Edge (89.0.774.54 Official build 64-bit)
• delay is longer than 20 seconds (disconnecting internet access does not change that)

I just tried the demo on Windows 10 on both Chrome and Edge (Stable), and it worked. Maybe an extension is interfering with the API?