This line chart have two LineSeries.... and Y-axis data have nullable data...
When i zooming to empty point side, The chart line draw at y-axis ... What can i do??
Thank you for the attached snapshot. Indeed there seems to be an issue with the chart. However, I was unable to reproduce this with the latest binaries. I have attached the project I created based on your description.
If you keep experiencing issues with this you can modify the attached project to reproduce this glitch and send it to us for investigation.