When you use MoveTo BT node, with a target set as Actor and your AIController is DetourCrowdAIController, the AI pawn will update its goal destination much less frequently.
Instead of constantly following a moving actor smoothly, it "jumps" in rotation to face the goal actor every second.
Zip file included with simple test AI to speed up the repro.
1. Create new third person blueprint project.
2. Add a nav mesh that covers the level, default parameters (with 4.7.2 I also had to set update at runtime in project settings, looks like it´s not more necessary)
3. Put attached files in Blueprints folder.
4. Put the "Bot" actor in the level
5. (optional)Play and run around: the bot will follow the player character smoothly.
6. Edit the Bot class, set Pawn Controller Class to DetourCrowdAIController
7. Play again and run circles around the AI. Notice how bot will have a jitter while rotating to face you.
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Head over to the existing Questions & Answers thread and let us know what's up.