Report Timestamps Differ between PLTCloud list and JSON

Here is the timestamp shown in PLTCloud for one of my test reports. This is the correct date/time:

When I download the JSON for this report, the "system_time" field contains "2021-10-25T16:54:26.841311453Z" which is 1) wrong, and 2) almost a day before the time shown in PLT Cloud. What's happening here? How do I get the correct timestamp?