Hey @treeese! Sorry for the delay, the website might fail to notify sometimes, I coincidentally saw your topic again from the list that’s under other topics. You can make sure that you indeed notify users by tagging them. (Probably, because other notifications such as likes also don’t get registered sometimes, along with replies. So maybe tags might also not work from time to time, but it’s a good measure.)
Anyways, I think it’d be better if you went with the first approach I suggested. Or try unchecking Sweep.
Let us know how that goes 