Streaming outputs in codex exec insert empty lines, then dump bulk text (no smooth stream)

What version of Codex is running?

codex-cli 0.45.0

Which model were you using?

gpt-5

What platform is your computer?

Linux 5.15.153.1-microsoft-standard-WSL2 x86_64 x86_64

What steps can reproduce the bug?

In the latest Codex Exec update, the streaming output isn’t smooth anymore.
It first shows a bunch of empty lines, then suddenly prints a large chunk of text all at once, instead of streaming gradually.

This makes user wait a long time before seeing any real output, especially with longer responses.

What is the expected behavior?

Expected: text should appear smoothly and continuously.

What do you see instead?

Actual: it pauses with blank lines, then dumps everything at once.

Additional information

_No response_