Perspective XY Chart Datetime Unexpected Behavior

I have an XY Chart component that is populated by a query binding that calculates some counts per hour. An issue I have noticed is that when the first 'column' is populated in the chart, it does not reflect the actual time stamp that is listed in the dataSources property. It has the correct date, but always shows 12AM, even when the time is different.

However, when more than one 'column' is populated in the chart, all the datetimes suddenly accurately reflect their datetimes.

When only one 'column':

When more than one 'column':

Anyone know why this could be happening?

Ignition version: 8.1.42