Highcharts - Adding a point with addPoint stretches time

Question

When you spam click Add Point on the JSFiddle below, you will see that it does not respect the time interval, and instead it stretches the time.

https://jsfiddle.net/ouc2x3ng/1/

I have read this: https://www.highcharts.com/demo/spline-irregular-time, and I can't see what is so special that makes it work.

Answer 1

You need to disable the ordinal property for xAxis, which is enabled in Highstock by default:

xAxis: {
    ordinal: false
},

Live demo: https://jsfiddle.net/BlackLabel/apscbLjn/

API Reference: https://api.highcharts.com/highstock/xAxis.ordinal