Date issue after upgrading dhis2 version

I have a problem with dates after an upgrade to a new version of dhis2 2.28 from version 2.26, 2.27. An Event Captured with dates seen but after running Analytics and running Event Reports for that particular Event dates are missing. Until a new Date Element is created e.g seen in the image (Date_1) then date is retrieved in the report.

what is really the issue please help, below are the images showing the happenings