Typemapping to date property seems to incorrectly convert a timestamp's timezone

[DnOberon]

Bug Description

From what I've looked at this seems like a bug, but I may be misusing the typemapping system. When I typemap a property as a date type, and don't provide a date format string, the UTC timestamp I give gets changed by 6 hours. It seems like timezone conversion, but I import UTC dates, and by not providing the timestamp string it should be assumed as UTC time.

Steps to Reproduce

Import data like this "StartDate": "2021-10-04T07:00:00.000Z" and create a node from it using a date type and don't give a timestamp string. When you query the node, you will see the date is now "StartDate": "2021-10-04T01:00:00.000Z".

Impact

Data seems to be changing when it shouldn't.

[browjm4]

timestamps in general have issues in DL and need to be fixed