How to modify the Stops duration

Hello
I would like to reduce the minimum parking time to 20 seconds only instead of 5 minutes (default).

Here is the configuration I made on the conf / traccar.txt file:

   <entry key = "report.trip.minimalTripDuration"> 50 </ entry>
   <entry key = "report.trip.minimalTripDistance"> 50 </ entry>
   <entry key = "report.trip.minimalParkingDuration"> 20 </ entry>
   <entry key = "report.trip.greedyParking"> true </ entry>

Unfortunately the results on the reports are not correct

For example, vehicle stopping times of 3 minutes, 5 minutes are not displayed!
What I noticed is that when there is long-term parking (1 hour or more) stops of 30 seconds to a 1 minute are displayed.

Can someone help me please to understand what's going on ?
Is my configuration correct ?
Should I can be added something?

thank you in advance for your help