tooltip.xDateFormat not working in highstock

[rdp1414]

[tooltip.xDateFormat](https://api.highcharts.com/highstock/to ... DateFormat) is NOT working in highstock - See [fiddle](https://jsfiddle.net/npr3bjw6/1/). Can you tell some fix?

Surprisingly [tooltip.xDateFormat](https://api.highcharts.com/highcharts/t ... DateFormat) is working correctly in highcharts - See [fiddle](https://jsfiddle.net/5wk9zso3/). In using highcharts instead of highstock, we're loosing out on features and performances designed particularly for datetime-highstock.

[michal.f]

Hello,

I added tooltip.xDateFormat to the simplest demo available on our website and it works without any problems, maybe it's because of bad data or xAxis.type.

Demo: https://jsfiddle.net/BlackLabel/rj5qpeyk/

Best regards!