Not that a caller would typically do this - but I have a script that goes to a prompt with an option to press * to repeat it, as it's an email address mentioned. I do repeat it, but thought to confirm I'd offer the option again. I can press * twice, each time will play the prompt again. If I select any option after hearing the prompt a third time, whether it's * to play it again or 1 to return to the main menu (via another trigger), I get 'Thank you for calling, good bye'.
It's not likely to be a concern - but I wonder where that threshold or repetition limit is set?