The line stops being displayed whilst zooming and scrolling in the x-axis.
Steps to reproduce problem:
1. Create graph with several points, far apart on the x-axis.
2. Zoom in on one of the data points, so that all other points are out of sight (by a good margin). The line stretching from that point to the next should still be visible at this time.
3. Scroll left / right away from the original point that you zoomed in on, so that it is no longer displayed on the screen.
The line that was linking the two points vanishes. Scrolling back, the line re-appears, but it does not appear to be rendered whilst no points are visible.
I've checked and this bug does not appear on the y axis - just the x.
I'm using zedgraph 18.104.22.168461
Love this library! Keep up the good work.