Camera jitter when rotating on large terrain

Development Cinematics & Media
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1

Hi every body!

I’ve asked some questions before about my problem, that actor jitter when moving on large terrain.
Today, i know that isn’t actor jitter, it is jitter from Camera.

My simple code follow

void ASkyDriving_Mi17::Move(float DeltaTime)
{
	FVector currentVelo = getCurrentVelo();
    SetActorLocation(GetActorLocation() + currentVelo*DeltaTime);

    currentVelo.GetSafeNormal();
	FVector dir = GetActorForwardVector().GetSafeNormal();
	if (!currentVelo.Equals(dir,0.5f))
	{
		SetActorRotation(FMath::Lerp(GetActorRotation(), currentVelo.Rotation(), 0.05f));
	}
}

I don’t know why camera small jitter, as i said before, i think that camera update doesn’t sync with actor transform, or Unreal engine has more than one Tick?.
My attached image is my actor structure ( a pawn ).

Please help me, thank you so much!

Best,