Hi Nicolas,
We would like to inform you that in WPF, each chart element
is also a UI element, and setting the width for individual series can cause
issues. We recommend not setting the width for the series.
By removing Series.Width = 30 from your provided code
snippet, you should achieve the correct output.

Please let us know if you have any further questions or need
assistance!
Regards,
Nitheeshkumar.