[Bug] GPT-5.3 Codex Spark blocked by usage limit despite 100% quota remaining

What version of the Codex App are you using (From “About Codex” dialog)?

26.901.6511.0

What subscription do you have?

ChatGPT Pro

What platform is your computer?

Microsoft Windows NT 10.0.26200.0 x64

What issue are you seeing?

Summary

After exhausting the quota for GPT-5.6 Sol, switching to GPT-5.3 Codex Spark does not allow sending prompts. The chat session remains locked with the previous usage limit error, even though the account settings show 100% remaining quota for GPT-5.3 Codex Spark.

Observed Behavior

1. In the account usage settings, GPT-5.3-Codex-Spark clearly shows:
   • 5-hour limit: 100% remaining
   • Weekly limit: 100% remaining
2. In the chat window, the banner states:
   You're out of Codex and Work usage. Add credits to keep going now, or wait for usage to reset on 9월 13일 오전 10:36
3. Prompt submission remains completely blocked with the warning:
   사용 한도에 도달했습니다. 계속하려면 크레딧을 추가하거나 2026. 9. 13. 오전 10:36에 다시 시도하세요.

(Screenshots attached)

What steps can reproduce the bug?

Feedback ID: 019fea46-f61b-7db2-8175-4cddd0cbf3a9

What is the expected behavior?

No response

Additional information

No response

Start with feedback ID 019fea46-f61b-7db2-8175-4cddd0cbf3a9 and compare the account usage settings with the chat window's limit state. Reproduce by exhausting GPT-5.6 Sol, switching to GPT-5.3 Codex Spark, and attempting to submit a prompt; done means the available Spark quota permits submission.