Hi,
Looking into the older post - the issue tracker eventually became public at https://issues.unrealengine.com/issue/UE-90813
It is backlogged but, I found a public issue tracker with something closer to your bug at https://issues.unrealengine.com/issue/UE-164500
which has the target fix set to 5.7.
We don’t provide updates on UDN, but progress can be followed on that public issue tracker page.
Regards