Sometimes on a service team, the ebb and flow of sprints will break down.
Largely I've seen this happen because the team is caught up in the now and loses focus on the next.
The now is important, but the now quickly becomes yesterday.
A team needs to understand what the short and long term goals are, are should be actively working towards them.
A feature that is six months away can quickly become a feature you failed to deliver in six months.
The best teams I've worked on have a clear vision of where they want to be, they set off with a purpose and work out the plan on the way.
The worst are the ones that wait or try and execute a perfect plan. The longer the plan the greater the odds of it being wrong.