@Geek of Ages
Is the feature still under development, or is this a bug, or am I just misunderstanding it?
No, you're using it correctly. It's not under development. It has been fully debugged and works as expected.
On my iphone and my Macs it works exactly as it should. It also works on the android phone that I have (latest version) and it works correctly in desktop firefox and desktop chrome.
I'm not really versed in every device's quirks, so I may not be able to fix it and make it work on your devices.