Rounded corners in stacked column chart do not display correctly

[RichardPoes]

Describe the bug
When supplying data to the stacked bar chart, where one of the top-most bars has a length of 0, no rounding is applied, as show in the screenshot

To Reproduce
I have created a gist with a minimum working example: https://gist.github.com/RichardPoes/1662357aa582454198b08ce04e1cf51e
This code can be pasted inside the code tab of the Radzen Blazor documentation page of the stacked column chart https://blazor.radzen.com/stacked-column-chart

Expected behavior
I would expect the topmost part of the bar to be always rounded, regardless of whether there being other 0-valued categories stacked upon it.

Screenshots

Desktop (please complete the following information):

• OS: Windows 11
• Browser: Google Chrome
• Version: 128.0.6613.114 (Official Build) (64-bit)

Additional context
No additional comments, but I'd be happy to answer questions, or to help in other ways.