Y Axis boundaries on Line/Area/Bar charts remove values rather than truncating.

[rusackas]

Bug description

Y axis truncation doesn't truncate the lines/areas, it deletes the data point entirely

How to reproduce the bug

1. Create a dataset from this sample query:

SELECT 1 AS value, '2023-01-01'::date AS date
UNION ALL
SELECT 2, '2023-01-02'::date
UNION ALL
SELECT 3, '2023-01-03'::date
UNION ALL
SELECT 4, '2023-01-04'::date
UNION ALL
SELECT 1000, '2023-01-05'::date
UNION ALL
SELECT 4, '2023-01-06'::date
UNION ALL
SELECT 2, '2023-01-07'::date
UNION ALL
SELECT 3, '2023-01-08'::date
UNION ALL
SELECT 4, '2023-01-09'::date
UNION ALL
SELECT 2, '2023-01-10'::date
UNION ALL
SELECT 3, '2023-01-11'::date
UNION ALL
SELECT 4, '2023-01-12'::date
UNION ALL
SELECT 2, '2023-01-13'::date
UNION ALL
SELECT 3, '2023-01-14'::date
UNION ALL
SELECT 4, '2023-01-15'::date
UNION ALL
SELECT 3, '2023-01-16'::date
UNION ALL
SELECT 4, '2023-01-17'::date
UNION ALL
SELECT 2, '2023-01-18'::date
UNION ALL
SELECT 3, '2023-01-19'::date
UNION ALL
SELECT 4, '2023-01-20'::date;

2. Create a line chart (or area chart) plotting this time series. Awesome:

Now turn on Y Axis truncation, and set the Max value to something less than our high peak of 1000.

Expected result - proper truncation (in 3.0)

Acutal result - that data point on the 5th is just GONE:

Screenshots/recordings

See above.

Superset version

master / latest-dev

Python version

3.9

Node version

16

Browser

Chrome

Additional context

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Checklist

• I have searched Superset docs and Slack and didn't find a solution to my problem.
• I have searched the GitHub issue tracker and didn't find a similar bug report.
• I have checked Superset's logs for errors and if I found a relevant Python stacktrace, I included it here as text in the "additional context" section.

[rusackas]

Same is happening on Bar charts, it seems:

becomes