[Bug] Free reset changed weekly reset_at without restoring allowance

Environment

• Codex for Windows 26.715.12143
• ChatGPT Plus
• Windows 11
• Not model-specific

Issue

A free Codex usage reset may have advanced the backend weekly reset_at timestamp without applying the corresponding weekly allowance replenishment.

Observed sequence:

• Jul 18, 2026: next reset showed Jul 24.
• Jul 19: it changed to Jul 25.
• Jul 20: it changed to Jul 26.
• During this period, the weekly allowance did not replenish.
• Codex remained usable and usage continued to be deducted.
• Refreshing, signing out/in, changing browsers, devices, networks, and VPN settings did not correct the day-level change.
• A later free reset restored the allowance to 100%.
• Two remaining manual Full reset credits were unchanged, so I did not trigger that restoration manually.
• After normal usage, the page showed a new reset time of Jul 29, 2026 at 10:26.

Suspected behavior

An earlier free reset may have updated the weekly window and reset_at, but failed to apply the allowance restoration. A later free reset appears to have applied both.

This is a hypothesis requiring backend verification.

Expected behavior

A free reset should update the reset window and replenish the allowance consistently, or leave both unchanged.

Diagnostics

Feedback ID: no-active-thread-019f8d3c-1f1c-7f12-9f92-e62e00bd213e

Private Support case with sanitized HAR and account evidence: 11775963

I will not upload the HAR publicly.

Please check whether free/special reset events can update reset_at independently from allowance restoration, causing a partial failure.

Related to #9508, but this report concerns a possible partial reset failure.