DataFlex 2021 Update Release Notes (dataaccess.com)
It does not mention the release where it was fixed. It's under the "updated" release for 20.0 (not the GA) . Have you installled the updated release in your client ?
- Fixed - Moving a datetime with a PM value in it to a datetime (or datetime2) column, the fieldputstring loses the PM value and the stored date is AM
Regards