I haven't explored this further yet. However, I'm aware that several of us have been working on getting story output from the model that does not end with a concluding summary, and this has been a real challenge, I'm not aware of it being really 'solved' yet.
I simply used 'write me a story' as a task to interrupt here, and informed the model it would be interrupted.
But in my experiment I asked the model to continue the story, and it ended without a summary.
Maybe it's the viewpoint it was asked to write from, maybe its the fact that it's told stop generation will be used and it will be interrupted, maybe it's just luck.
However, even if this is a once, here is a story output from 3.5 that does not end with a sum-up, and looks ready to continue as is.
https://chat.openai.com/c/4ca8610e-e07f-4b41-ad47-d44738bc4f90