Failing to exit plan mode

[paulbettner]

Using GPT5.2 with high reasoning, I often see the model struggling to exit plan mode. This is with the system prompt and toolset set to codex.

Here's an example of what the failure looks like:

[cpacker]

@paulbettner any chance it's related to this? #1032

[paulbettner]

I bet that's totally it @cpacker.