I had made a thread about it and this post mentioned the workaround
I think I figured out the issue, and it seems to be a Discourse bug. If you do a quote and don’t make and changes (type some text, hit enter, etc.) then when you minimize the reply window it goes away. It probably thinks you wanted to cancel because you didn’t type anything. However, it has also saved a Draft. Then when you grab your next section to quote you get the Reload message because there’s a Draft message already that it seems to have forgot about. Workaround: select text, hit quote h…
Its a feature i use on Xenforo quite a bit, the ability to quote several parts of a long post to reply to each piece individually. One can do it manually here like the old forum (though it glitches at times) but with the new software perhaps it can be done? Not to add to Sb’s workload, maybe something to think about down the road unless its a simple setting that can be enabled?