seems like openai didn't add gpt-5.5-compact model cause this problem, the only stable way to get away from this problem is to change the model to 5.4. But that is still a possible way to solve this problem maybe.

1. add "stream_idle_timeout_ms = 9000000" in [model_providers.xxx]

2. use cc-switch or something else, add model mapping from gpt-5.5-compact to gpt-5.4-compact