Codex App crashes reliably when opening new tab then navigating back in the in-app Browser

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

Codex Desktop 26.602.40724 (3593)

What subscription do you have?

Pro 20x

What platform is your computer?

Darwin 25.5.0 arm64 arm

What issue are you seeing?

Codex App reliably crashes when opening a new tab from the in-app browser, then pressing the browser's back button.
Attached a redacted MacOS crash report.

Crash summary:
EXC_BREAKPOINT (SIGTRAP)
Triggered by Thread 0: CrBrowserMain
Codex Framework 149.0.7827.54
macOS 26.5 (25F71)
Apple Incident Identifier (if helpful): 93435558-9131-4F22-9883-AA3C0FAC60AF

codex-iab-back-crash-redacted.txt

What steps can reproduce the bug?

1. Open a page in the Codex in-app Browser.
2. Click a link that normally opens in a new tab/window.
3. Codex opens it in the same in-app browser view because there is no multi-tab UI.
4. Press the in-app Browser back button.
5. Codex crashes a few seconds afterwards.

What is the expected behavior?

No crash, navigate back to the original tab.

Additional information

_No response_