It's vital to understand that the text is generated using artificial intelligence, over which we do not have full control. Despite training the various models employed, the AI can occasionally deviate, particularly concerning the length of the generated text.
Consider this scenario: if you set the maximum length at 250 words and the AI is in the midst of text generation, halting at 250 words might occur mid-sentence, rendering the text incoherent. Therefore, the AI will continue writing until it finds a suitable stopping point that doesn't compromise the text quality.