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Autocomplete loading and empty states: refresh spinner replaces all existing completion rows · case 02

The preserve completion transition produces an incorrect observable state.

Member previewVariant 2 · 3 implementations · 22 checks per implementation

Case contract

A loading snapshot distinguishes initial loading, background refreshing, settled-empty, error and cancellation. Only settled successful empty responses show no-results. Existing rows may remain visible during refresh but are bound to the draft they represent; stale errors never overwrite a newer query status.

Why this case matters

Autocomplete couples draft text, suggestion identity and asynchronous presentation; this bounded lifecycle model isolates one observable interaction defect.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
normal preserve	`[]`	`["a"]`	Failed

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