Hi,
Thank you for contacting us!
The numbers are displayed properly - but because of the font size and cell width, they don't fit inside their cell and overlap with the next one.
You can change the
font size, but that might make the chart less readable on mobiles.
The second solution would be to implement the
chart.scrollablePlotArea. That way you can set the
minWidth of your chart, and not lose the readability of the data.
DEMO: https://jsfiddle.net/BlackLabel/9ycw8x1d/
API Reference: https://api.highcharts.com/highcharts/c ... lePlotArea
Let me know if this solves your issue,
Best regards!