My squad and I experienced this bug today, for the first time. I was surprised I hadn't seen it before, even though, of course, there were a lot of reports describing the issue from 3-4 months ago. I hope DE is aware of it and can address it soon, because yeah, it can be incredibly frustrating, wasting so much time. My squad decided to all abort the mission in the end, ~40 minutes wasted, because no markers popped up and we could not find the necramite anywhere.😭