Hi,
Thanks for using Essential Chart.
I was not able to reproduce your issue. Kindly, get the sample from the following link which I have used to reproduce the issue.
http://files.syncfusion.com/support/Chart.Windows/V7.2.0.20/I56938/main.htmCan you please try reproducing it in the above sample and send back.
Kindly, let me know if you have any other queries.
Thanks,
Manimala.