Talk not listing all contacts in app

The new Talk client is great (1.2.0) but for some reason it doesn’t pull in all of the contacts.

I have a fairly large database of users as it’s joined to the A/D. It’s sitting around 600 accounts. Even if I let it load for a moment and then do a search some of the users do not show up. If I use NC Chat interface via Web it’s fine. If I start the conversation off in the Web interface I can continue on the app.