duplicate-field-in-form

The failure

Two or more non-checkbox/radio controls share a name inside one <form>. For a non-GET request htmx collects the surrounding form’s values and lets them override the element’s own. Most body parsers keep the last occurrence — so editing the first row saves the last row’s value.

Checkboxes and radios are exempt: sharing a name is what they are for.

Why nothing else sees it

Each row looks correct in isolation. The bug is the enclosing form, which is easy to add “for the bulk action” and leave around the table forever.

The fix

Give each row its own hx-* attributes. Use hx-include when you need extra fields — do not wrap the table in one form. See Per-row controls.

Fixtures: TABLE_WRAPPED_IN_FORM vs TABLE_WITH_HX_INCLUDE in Fixtures.