Attachments api downloadAttachments flag doesn't seem to work

[galacticgibbon]

In my web implementation, I don't want to download attachments to memory, since a user on my app can have thousands of attachments. So I fetch on demand.

I tried turning 'downloadAttachments' off, but that didn't seem to work. All attachments were downloaded on init.

I had to turn it off by returning an empty stream in watchAttachments instead

    downloadAttachments: !kIsWeb, // not working
    watchAttachments: () {
      // downloadAttachments doesn't seem to work on web
      if (kIsWeb) {
        return Stream.value([]);
      }