Thank you very much for this plugin, 
how the unbound navigation manager is used? The pawn refuse to move when I have that volume placed. The “Fly To”-command stays active, but nothing happens. The volume covers the pawns. With normal manager, the pawns move normally. Also noticed the normal manager crashes the editor sometimes if unsuitable destination location is set. Using now the “is location within navigable world and beneath landscape” checks, but randomly the destination dosent seem to be suitable. That seem to cause sometimes long freeze when stopping playtest in viewport.
Edit: Nevermind, got unbound option working now too. Added abort for “fly to” when new location is set. Seems like it didnt like to get location right after game start.