Hi, can someone please take a look at the behavior of the <Rejected> port of the DateTimeConverter and check if it's as expected:
https://knowledge.safe.com/questions/113416/different-date-formats-in-the-same-date-column.html
The behavior is described in my answer and the comments below it.
Possibly the same issue: https://knowledge.safe.com/questions/91296/datetimeconverter-rejected-port-null.html