Timer does not trigger reminder at the exact time [answered]
For example, set a timer of 1 minute, it may triggers the reminder at 59.xx second. It seems that the first second ( from 1 minute to 59 second in the example ) the timer do not work normally. It seems that the timer will jump to next second when the seconds of system time change. It means that the "first second" is always less than 1 second. A diagram to explain that. '!' means you tap on a timer and it starts.
timer in different situation:
___!_ . _____ . _____ . _____ ......
__!__ . _____ . _____ . _____ ......
!____ . _____ . _____ . _____ ......
system time:
__1s_ . __1s_ . __1s_ . __1s_ ......