The line is not render for fixed values (same value for all)

[NaderChinichian]

The array data with constant value is not rendered in the line chart.
Example:
data = [250,250,250,250,250,250,250,250,..............,250,250,250,250,250,250,250]
In this example, the SP tag is always 250.0 but the line is not rendered. If I try to change one of the element manually the line draw automatically.

[traviscox]

Can you share your config for the chart?