Codex cannot read github issue

What version of Codex is running?

web cloud

Which model were you using?

GPT5

What platform is your computer?

WEB

What steps can reproduce the bug?

• Mentioning codex in issue itself does nothing
• Passing issue link in prompt does nothing
• Adding custom instructions does nothing
• Creating custom github personal access token and storing it in secrets + providing instructions does nothing

Any suggestions how to actually use github integration for anything else than code reviews ?

What is the expected behavior?

Use github integration (oauth) to provide full details of issue as base for task

What do you see instead?

Completely hallucinating non existing task

Additional information

Docs even mentions that we can mention @codex to get input on issues, but that does nothing