What is the current behavior?

For stacked area charts, if I specify connectNulls={true} for the areas, then stroke lines will still be drawn for null values, which can cover up the stroke lines from non-null areas--I feel like this isn't really ever desired behavior.

Turning off connectNulls is an options, but the there are unsightly gaps in the areas:

What is the expected behavior?

connectNulls should connect the previous and subsequent x-axis ticks as if they were zeroes, but ignore null data points otherwise still.

Alternatively, stroke lines for areas with non-null data should always have a higher z-index than those from nulls.

Please provide a demo of the problem in a sandbox

https://stackblitz.com/edit/2kkz7jmq-ysrufwh9?file=src%2FExample.tsx

Please try to keep the demo as small as possible while still showing the problem.

Which versions of Recharts, and which browser / OS are affected by this issue? Did this work in previous versions of Recharts?

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