It actually didn’t work like that in RX3.
You have similar problems on Win 7, so it’s not exclusive to Win 10. If anything they might be Nuendo 7 specific.
That’s odd. The one thing that has worked for me is actually getting the clip to RX. In the end I adopted a different workflow simply because there was no time gain unless I used “connect” to get the clip back into Nuendo. But I ended up getting crashes and I before I had time to iron out what caused it (related to naming I believe) I had moved on to more important things and just adjusted my workflow.