Hi Nathan,
I have put together a bug report for this, which can be tracked here if/when it’s approved for public visibility: Unreal Engine Issues and Bug Tracker (UE\-273273\). There is no ETA as priorities for bugs and features can shift at any time.
We don’t provide updates on UDN, but progress can be followed on that public issue tracker page.
In the interim, the fix you have in place should be sufficient in circumventing this bug.
Take care,
John