I noticed that when an NPC is moving around its loop that it will not stand still while a conversation is going on. This may make talking to some quest NPCs rather... difficult.

MovementLoopAddLocation has a delay value. Just set it high enough for your conversation to complete.

The delay is the value set for when the NPC reaches it's destination though. I think what Xan is trying to say is, this NPC is moving around in a loop and can be hailed at any point for a quest. But right now, the NPC just keeps moving when hailed so you'd have to follow him or her around its loop to talk to them.

Indeed Scat... The NPC will have the conversation but they wont stop moving around.