Anyone know about a bug with Leliana's Orzammar bug dialogue

You may have exhausted her conversation options, or raised her approval too high, too quickly... some of her conversations will only occur at lower approvals. And some of them will only trigger in party camp.

Try returning to camp and then lowering her approval (giving her Feastday Pranks coal and onions are the easiest way, though I believe there may also be a console command on PC) and see if other conversations open up. (You can raise approval again with Feastday Thoughtful Gifts and Sugar Cakes).

And if you are trying to get the Cute Nug quest to trigger, that has some very specific conditionals (active romance or personal quest completed) and requires there not be any outstanding camp conversations.