Set your Dialogue Manager's Default Sequence to: Delay({{end}}).
Let's assume the first node is assigned to the NPC. (The node should be gray in this case.) Set the node's Sequence to:
Sequence: Camera(Closeup); Delay({{end}})
If that's too close, then use a different camera angle such as Camera(Medium).
If the camera doesn't stay in a closeup, then a non-Dialogue System script is probably controlling it. Use a Set Component Enabled On Dialogue Event component to disable the script during conversations.
when open the quest log and click in track (quest) many times (is not necessary clicked continue) the screen freezes for various seconds. and with every new click the freezes is bigger in seconds.