Fail to use the One-Off offline temporary password?

Analysis: 1) If the pwr was not used in 6hours after being generated, it would become invalid; 2) The pwr expired after used; 3) The RTC drift too much (i.e. remove mins, only keep hours, not sync with cloud). Suggestion: 1) Please use the pwr in 6 hours; 2) Check if the pwr is used; 3) Check if the MCU would conduct RTC calibration automatically