QImage memory leak when called via QVideoSink

When running the following code, the memory used by the app increases over time quickly:

Header file:

#ifndef TESTY_H
#define TEST_H

#include <QMainWindow>
#include <QMediaCaptureSession>
#include <QVideoSink>
#include <QVideoWidget>
#include <QCamera>class Testy : public QMainWindow
{
    Q_OBJECT

public:
    Testy(QWidget* parent = nullptr);
    ~Testy();
    QCamera* camera;
    QMediaCaptureSession* capture;
    QVideoSink* sink;
    QVideoWidget* video;public {}
slots:
    void videoFrame(const QVideoFrame& frame);
};
#endif

Source File

#include "testy.h"
#include <QApplication>
#include <QVideoFrame>
#include <QMediaDevices>

int main(int argc, char* argv[])
{
    QApplication a(argc, argv);
    Testy w;
    w.show();
    return a.exec();
}

Testy::Testy(QWidget* parent)
    : QMainWindow(parent)
    , camera(nullptr)
    , capture(new QMediaCaptureSession(this))
    , sink(new QVideoSink(this))
    , video(new QVideoWidget(this))
{

    this->setCentralWidget(video);
    capture->setVideoOutput(video);
    connect(video->videoSink(), &QVideoSink::videoFrameChanged, this, &Testy::videoFrame);    const QList<QCameraDevice> cameras = QMediaDevices::videoInputs();    QCameraDevice camDevice;
    for (auto c : cameras)
    {
        // Set the name of an active webcam here
        if (c.description().contains("HD Pro Webcam")) {
            camDevice = c;
            break;
        }
    camera = new QCamera(camDevice);
    capture->setCamera(camera);
    camera->start();
    
}

Testy::~Testy()
{}

void Testy::videoFrame(const QVideoFrame& frame)
{
    // This line appears to create the leak.
    QImage img = frame.toImage();
}