Is there any solution for round top bars in stacked chart? I can round one bar, but if it's width 1 px, I want to round second bar too.

I want to get something like this:

But now I can round only one bar on the top, and if its height 1px, rounding is not visible.

Example with simple stacked bar: https://codesandbox.io/p/sandbox/frosty-browser-4lsj2y?file=%2Fsrc%2FApp.js%3A20%2C5