My last message on the Data Engine was delayed by nearly 5 hours and I suspect other message(s) are still waiting on the queue. logged timestamp, which coincides with the time of the webhook request, is several hours after the received timestamp displayed in the dashboard.
e.g.,
{
"data": {
"logged": "2019-08-22 07:26:19.405472",
"data": "{\"received\": \"2019-08-22T02:44:28.143023\"..."
}
}