"Please drink milk."
From a conversation I read with a content creator, they actually don't see the comments in these sentence discussions, which are mostly places for learners to talk about things. So, reporting it from the lesson is the best approach. (Just an FYI, since I recently learned this myself.)
They do! But I know there were a few issues they were working on. If you have the ability still to write something in, I would take advantage of it. And if it's a "my answer should have been accepted" report, I'd write in what your response was, as I believe there were problems connecting them together (meaning, the responses were not connecting to the reports). I'm not sure if there's an ETA on the fix, but that's what I'd recommend for now. :)