master details not work in last row

[mrkwlee]

I am new and I  have a problem in lazreport:

System:     lazarus 1.6.4 64bits Win 10 , sqlite 3 , zeoslib 7.14
2 ZQuery:  ZQresult ( with fields Q_NO....), ZQTitle ( with fields Q_NO, TITLE...)
2 Datasource: DSResult, DSTitle

In ZQTitle
LinkedFields: Q_NO
MasterFields: Q_NO
MasterSource: DSResult

On screen, when I edit DSResult, Q_NO entered gets correct TITLE from DSTitle,
When I move from one record to another in DBgrid TITLE is refrshed correctly.
However, when lazreport is used to print all or a list of the records the TITLE field values are correct in all rows except the last row.
 I have strugled for a week and get no fix. 
 Any one get the same problem?
Did I miss something?

[mrkwlee]

Solved by adding ZQDetails.Refresh to the event of frDBDataSet1Next :