Alice-608 opened a new issue, #37921:
URL: https://github.com/apache/superset/issues/37921
### Bug description
Bug description
Summary
This is a residual bug from the fixed issue (BUG: 6.0.0 Mixed Chart -
Duplicate label rendering in tooltip/chart area #37055).
The initial fix resolved general duplicate labels, but the first metric is
still duplicated when adding multiple metrics + 1+ Group By dimensions in the
same Query.
How to Reproduce
1. Deploy the latest master branch of Superset
2. Create a Mixed Chart → Query A:
- Metrics: `score_one`, `score_two` (unique aliases, no duplicates)
- Group By: `name` (categorical dimension)
3. Run the query and save the chart
4. Observe the legend/tooltip: The first metric (e.g. `score_one`) appears
twice (e.g. `score_one, Jack` and `score_one, score_two, Jack`)
Expected Results
All metrics/dimensions render only once without duplication.
Actual Results
First metric is duplicated in the same position; query data is correct, only
frontend rendering is broken.
Screenshots
<img width="3282" height="915" alt="Image"
src="https://github.com/user-attachments/assets/a117c71c-e278-4bf6-9a4b-3cdf98fb67a3";
/>
Related Issues
- Original fixed issue: #37055
- This is an edge case not covered in the initial fix.
### Screenshots/recordings
_No response_
### Superset version
master / latest-dev
### Python version
3.9
### Node version
16
### Browser
Chrome
### Additional context
_No response_
### 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.
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