Some issues with time on x axis

I have a vector with date and with values. The problem is that the graph does not correctly display time on the x-axis. For example, if the time is 17:27:... the chart displays 05:49:... and because of this it is plotted incorrectly!

#include "qcustomplot.h"

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    QCustomPlot* plot = new QCustomPlot();
    setCentralWidget(plot);
    plot->xAxis->setLabel("Time");
    plot->yAxis->setLabel("Position");

    QSharedPointer<QCPAxisTickerDateTime> dateTicker(new QCPAxisTickerDateTime);
    dateTicker->setDateTimeFormat("HH:mm:ss.zzz");
    plot->xAxis->setTicker(dateTicker);

    QVector<double> xData, yData;

    QVector<QString> dateTime = {"2023-08-15 17:27:02.994591",
                                   "2023-08-15 17:27:16.240445",
                                   "2023-08-15 17:27:16.441496",
                                   "2023-08-15 17:27:16.639997",
                                   "2023-08-15 17:27:16.841136",
                                   "2023-08-15 17:27:17.424592",
                                   "2023-08-15 17:27:17.240649",
                                   "2023-08-15 17:27:17.441818",
                                   "2023-08-15 17:27:17.640868",
                                   "2023-08-15 17:27:17.841120",
                                };

    for (const QString& value : dateTime)
    {
        QStringList values = value.split(" ");
        QDateTime dataTime = QDateTime::fromString(values[1].chopped(3), "HH:mm:ss.zzz");
        xData.append(dataTime.toMSecsSinceEpoch());
    }

    for (int i = 0; i < dateTime.size(); ++i)
    {
        yData.append(i + 1);
    }
    QCPGraph* graph = plot->addGraph();
    graph->setData(xData, yData);
    plot->setInteractions(QCP::iRangeZoom | QCP::iRangeDrag);
    plot->rescaleAxes();
    plot->replot();
}