Stream disconnected before completion (invalid type: null, expected struct Error)

[voytas75]

What version of Codex is running?

codex-cli 0.58.0 and 0.59.0-alpha.5

What subscription do you have?

azureopenai

Which model were you using?

gpt-5-codex and 5.1-codex

What platform is your computer?

Microsoft Windows NT 10.0.26200.0 x64 (codex in WSL2)

What issue are you seeing?

i am on WSL2 Ubuntu@latest and working on python project. Prompted to analyze project and suggest features which was OK. codex suggests. when i choose one idea it started planning, exploring, updating files and unexpectedly thows below:
■ stream disconnected before completion: failed to parse ErrorResponse: invalid type: null, expected struct Error

prompt him to continue and after a few steps it's the same. it can finish implementing a feature. the error appears several times during the work process and regardless of the type of work I do with Codex

What steps can reproduce the bug?

idk, random. maybe a size of project > small.

What is the expected behavior?

No response

Additional information

No response

[github-actions]

Potential duplicates detected. Please review them and close your issue if it is a duplicate.

• Stream Disconnection #6659
• constantly getting stream disconnected before completion: An error occurred while processing your request #5130
• Stream disconnected before completion #6397
• stream disconnected before completion: An error occurred while processing your request. You can retry your request, or contact us through our help center at help.openai.com if the error persists. #4983

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[voytas75]

Issues were reviewed and none were found with this error: stream disconnected before completion: failed to parse ErrorResponse: invalid type: null, expected struct Error

[voytas75]

NOTE: i moved to 0.59.0-alpha.5 i do not see the error, only reconections but rarely

EDIT: 1h working and was fine :) wrote that's fine received ■ stream disconnected before completion: failed to parse ErrorResponse: invalid type: null, expected struct Error, hahaha. :/

[voytas75]

jump on 5.1-codex = same situation :(

[antonsoo]

Same

[thingersoft]

Same here — it seems to occur more frequently when using the *-codex models.

[datacatalyst-io]

Same issue on GPT-5. Rolling back to o3 fixes it. codex-cli 0.58.0

Uploaded thread: 019a8beb-ca38-7e33-bf88-bf3879ae83f5

Have closed my duplicate post.

[christianvossCaeli]

Same here, even on 0.59.0-alpha.5

[vikduf]

Same issue, started happening after 5.1 upgrade (am on azure aswell)

[gadogado]

seeing the same behavior for azure on 0.59.0-alpha.6