Dynamic AI Navigation

Deer Epic for the last week++ I have been strugeling with AI.
I am using dynamic generation of NAV Mesh that is only invoked around agents.
And i am unable to get the AI to move outside its current generated NAV Mesh radius.
This is not intended as a double post so for more info see:

Now it whould be realy nice if things like documentation or sample was available.
The use case am looking at is a large world pre building NAV Mesh will not be a option.
I know this was done for the Open World Demo (Kite Demo) is there any information on this subject?

Thank you.