I'm having the same problem on PC. I've found a temporary fix, if you can corner the character you are trying to talk to they wont be able to run far enough away to break dialogue. It isn't a true fix but it should help till the bug is patched out.
Thank you, found that out too, but it is tedious task to make that happen all time.
Any friendly area where you have to talk to get new quests or information has to be preppd before you do the talk.
Using Containers or your party to corner the NPCs. Anything you can find to make that happen.
