No, it does not - if you start the track and immediately skip back to the start, there should be no delay because the player should not interrupt the signal. Likewise, you should be able to skip between tracks or chapters without experiencing any signal acquisition delay....
I was keeping it short. Yes, if you restart the track, there is no delay/loss. And I did say the first track on the first CD. If you put in other CDs without switching inputs on the 990 I believe the first track you play starts just fine.