Why should you update the game just to solve this finicky issue? I added a more specific instruction to the game rule and the AI seems to narrate the story in a more detailed way. And if I keep improving the game rule or add the prompt correctly, I can make AI generate the story the way I like, right? I just don't want AI to finish the event right away and keep follow though with what I want it to narrate.
It is a solution to just adjust the rules to narrow it down to what you want from the AI, but it's different for everyone. Besides, some AI models might only take the exact example that you gave, assuming that you gave any. For example, you set it so that the AI can't use "and another, and another, and another...". In this case, the AI will still use "and again, and again, and again...". I've also had that issue with one AI model long ago. No matter what I set in the rules, it kept doing its' own thing.