Scale changed with VOID data points
So I may not be using the correct terminology, but......
When adding a serie that contains all VOID data points (i.e. sensors offline), the scale of the chart is changed to include the VOID constant.
This does not occur when only some of the data points are VOID.
For example:
2 temperature probes provide data from 50 - 70 degrees - Chart is fine.
1 temperature probe is offline so data is marked VOID for the entire chart period other probe is 50 - 70 degrees. Chart will show from -10 to 70+ degrees.
Remove the offline / VOID probe, then scale is between 50 and 70.
Hope that makes sense.