Why some time the lyrics would jump suddenly?

I guess it's not jump, lrcShow-X re-locate the lyrics that time may be.

lrcShow-X has a special timer, the purpose of this timer is to detect if the current track has been sought by user. The timer would let lrcShow-X re-locate the lyrics if it detects that the current time is not the place the track should be.

lrcShow-X could only get the time of current track accurate into a second for some player like mpd, exaile etc. The inaccuracy would course lrcShow-X to re-locate the lyrics.