Angle between two vectors not calculating properly

[pezzott1]

@MostHost_LA

plot twist

UFUNCTION(BlueprintPure, Category="CustomFunctions")
		static void F_YawToTarget(
			const USceneComponent* start,
			const USceneComponent* target,
			float& YawDEG);

#include "CustomFunctions.h"
#include "Math/UnrealMathUtility.h"

void UCustomFunctions::F_YawToTarget(
	const USceneComponent* start,
	const USceneComponent* target,
	float& YawDEG)
{
	FVector dir = (target->GetComponentLocation() - start->GetComponentLocation()).GetSafeNormal();

	float ForwardDotProduct = start->GetForwardVector() | dir;
	float RightDotProduct = start->GetRightVector() | dir;

	if (RightDotProduct > 0.f)
		YawDEG = FMath::Acos(ForwardDotProduct) * (180.f) / PI * (-1.f);
	else
		YawDEG = FMath::Acos(ForwardDotProduct) * (180.f) / PI;
}