Strange though... I spent my window after a couple of prompts and effective API time of 13m. Out for 4 hours and a half (why that?). The next day, today, I've tried to repeat the experience - even worse: one prompt for less than 10mins... and then suspended for 8 hours and a half. WTF?
How did you get suspended for 8 hours, given a 5-hour window? Maybe you are prompting it wrong [1].
[1] https://www.wired.com/2010/06/iphone-4-holding-it-wrong/