Am I getting gimbal lock when rotating a pawn 90 degrees using QInterpConstantTo? How Can i fix?

Development Programming & Scripting
1

I am trying to rotate an actor by 90-degree increments over time when the user presses a key. I have used QInterpConstantTo to do this, and it works fine in two axes, but on the third, I am getting what I think is gimbal lock as the interpolation never completes. I am using quaternions, so I don’t know what I am doing wrong? How can I prevent this when rotating an actor by 90 degrees in either of the 3 axes at one time? below is example code that causes the problem, when i press the key that binds to the 'ToggleRotateY function, the actor rotates twice then locks on the third attempt and no more input is accepted

Header File:
#pragma once

#include "CoreMinimal.h"
#include "GameFramework/Pawn.h"
#include "CubePawn.generated.h"

UCLASS()
class ROTATEMATCH_API ACubePawn : public APawn
{
	GENERATED_BODY()

public:
	ACubePawn();

public:	
	virtual void Tick(float DeltaTime) override;
	virtual void SetupPlayerInputComponent(class UInputComponent* PlayerInputComponent) override;

private:
	void ToggleRotateY();

	bool shouldRotate = false;
	float RotationSpeed = 10.0f;
	FQuat QuatTarget = FQuat(0.0f, 0.0f, 0.0f, 0.0f);

	UPROPERTY(EditAnywhere)
	UStaticMeshComponent* PawnMesh;
};

CPP File:

#include "CubePawn.h"

ACubePawn::ACubePawn(){
    PawnMesh = CreateDefaultSubobject<UStaticMeshComponent>(TEXT("Pawn Mesh"));
    PawnMesh->SetupAttachment(RootComponent);
    RootComponent = PawnMesh;
}

void ACubePawn::SetupPlayerInputComponent(UInputComponent* PlayerInputComponent){
	Super::SetupPlayerInputComponent(PlayerInputComponent);
    PlayerInputComponent->BindAction("RotateY", IE_Pressed, this, &ACubePawn::ToggleRotateY);
}

void ACubePawn::Tick(float DeltaTime){
    Super::Tick(DeltaTime);

    if (shouldRotate) {
        FQuat NewRotation = FMath::QInterpConstantTo(GetActorRotation().Quaternion(), QuatTarget, DeltaTime, RotationSpeed);
        SetActorRotation(NewRotation.Rotator());

        if (GetActorRotation().Equals(QuatTarget.Rotator(), 0.1f)) {
            UE_LOG(LogTemp, Warning, TEXT("Reached Target"));
            shouldRotate = false;
            SetActorRotation(QuatTarget.Rotator());
        }
    }
}

void ACubePawn::ToggleRotateY() {
    if (!shouldRotate) {
        QuatTarget = GetActorRotation().Quaternion() * FRotator(90.0f, 0.0f, 0.0f).Quaternion();
        shouldRotate = true;
    }
}