Preempt a state doesn't work

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Hi!

I have tried to do a concurrence state with one one monitor-state that check for a reset topic and one state with a lot of sub-states that do the actual work. The goal is to and the work if someone publish on the reset topic. My problem is that then I publish and the monitor-state get active and try to preempt the other state nothing happen and the work continue:

For every sub state it said:

[INFO] [WallTime: 1480428562.104071] [3378.814000] Preempt requested on state machine before executing the next state. 
[INFO] [WallTime: 1480428562.105243] [3378.814000] Last state 'First task' did not service preempt. Preempting next state 'Second task' before executing...

But then continue. Do I have to add something to all the state that should happend then preempting? They are ordinary smach.state.