CM25 - Operation duration shrinked when dispatching

Hi Gurus,

I am experiencing a difference in operation time duration between production orders before and after dispatching.

Here's the situation:

The production order before dispatching:

Start date: 10.06.2016 - Start time: 20:40:00

Finish date: 13.06.2016 - Finish time: 06:37:23

The production order after dispatching:

Start date: 10.06.2016 - Start time: 20:40:00

Finish date: 13.06.2016 - Finish time: 06:20:00

Could you please help me understand the cause of this behavior?

Thank you in advance for your precious help.

Best regards,

Silvia