Hi Andreas,
Greetings from Syncfusion.
We have analyzed your query. StepLine chart is rendering fine with y value as null for chart series data points. We are unable to reproduce an issue at our end, so we have prepared sample for your reference. Please check with the below screenshot and sample.
Screenshot
Sample
Since we are unaware of your exact scenario which the issue is reproduced, so please share the following information which will be more helpful for further analysis and provide you the solution sooner.
- Try to reproduce the reported scenario in the above sample.
- Please share your sample (or) code snippet with full configurations.
- Share the details if you have done any other customization in your sample.
- Share your datasource file.
- Share your preview template version.
Kindly revert us, if you have any concerns.
Regards,
Durga G