Form submissions include null entries for non-input children with ids

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
35/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Active
Tech stack
python
Domain
frontend, web-dev

Research direction

Start with PR #5430, then read prerelease-testing/2026-09-10-v0.9.11a1/FINDINGS.md and the related cluster notes and reproduction artifacts. Verify the radix form submission no longer includes id-derived keys with null values for labels, messages, or the submit button, using the reported payload as the regression case.

Written by the indexing model from the issue text.

Description

Submitting the radix form yields
{"email": "user@example.com", "nickname": "", "age": "42", "form_email": "user@example.com", "form_msg_required": null, "form_msg_type": null, "form_msg_server": null, "form_nick": null, "form_msg_nomatch": null, "form_age": "42", "form_msg_range": null, "form_submit": null}
i.e. the id of every element inside the form (labels, messages, the submit button) becomes a key
with a null value. Same on 0.9.10.post2. Harmless but noisy for handlers that iterate the payload.

Related existing PR #5430 removes ID-derived form refs; link this specific non-input/null-payload reproduction when evaluating that change.

Source: prerelease finding 034-10, recorded against Reflex 0.9.11a1 and compared with 0.9.10.post2. See the full campaign report and cluster notes and reproduction artifacts. Findings and verification status above are from that campaign; this filing does not claim a new browser rerun.

Dominant language
Python
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