Chart history/chart display problems

[nm]

I am using charts to display the voltage and current waveforms of 6 channels. Whenever the charts are cleared (either programatically (by writing an empty array to the chart history) or instantly by right clicking on the chart while running and selecting 'clear chart'), the display becomes impossible to read--See attached pictures.

Is there a way that I can fix this problem?

[altenbach]

Your "clean" version contains 50 ms of data while the "messy" version contains 2000ms of data. If both contain the same type of data, the display looks right. In the messy version, you have more peaks than pixel slices.

If writing an empty array creates 2 seconds worth of real data, we need to figure out where that data comes from!

Something is definitely wrong. Could you post a stripped down demo VI that exhibits the problem? What LabVIEW version is this?