JavaFX LineChart: String values of a CategoryAxis are collapsed - javafx

Question

I come with a question regarding a LineChart. I have a LineChart with xAxis as a CategoryAxes where I have dates and the yAxis as a NumberAxis where I have some numbers.
My problem is that on the xAxis, the values shown under the chart are overlapped and I cannot find the cause.
Here is my code where I setup the LineChart and display it:
private void createSecondLineChart(String gameName) {
xAxis2 = new CategoryAxis();
xAxis2.setLabel("Dată");
yAxis2.setLabel("Încercări");
yAxis2.setAutoRanging(false);
yAxis2.setLowerBound(0);
yAxis2.setUpperBound(10);
yAxis2.setTickUnit(2);
lineChart2.setTitle("Statistică dată/încercări");
ObservableList<XYChart.Series<String, Number>> chartData = DBUtils.getFirstGameDateStats(Stats.username,
conn);
lineChart2.setData(chartData);
for (XYChart.Series<String, Number> series : chartData) {
for (XYChart.Data<String, Number> entry : series.getData()) {
String date = String.format("Data: %s\n", entry.getXValue());
String tries = String.format("Incercari: %s\n", entry.getYValue().intValue());
double dbAvgScore = DBUtils.getAverageScoreForUserInSpecificDate(Stats.username, entry.getXValue(),
conn);
String avgScore = String.format("Punctaj mediu: %.2f", dbAvgScore);
entry.getNode().setOnMouseEntered(event -> entry.getNode().setStyle("-fx-background-color: #0084b8;"));
entry.getNode().setOnMouseExited(event -> entry.getNode().setStyle(""));
String tooltipText = date + tries + avgScore;
Tooltip t = new Tooltip(tooltipText);
t.setShowDelay(javafx.util.Duration.millis(0));
Tooltip.install(entry.getNode(), t);
}
}
lineChart2.setLegendVisible(false);
lineChart2.setVisible(true);
}