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Dates with time indication only display date

Hi, I’m importing telemetry data with two date columns. I can format them at the source and they seem to be imported ok.
Current format is: 2018-11-27 07:33:06.535
The problem is that displayed columns only show the date, and not the time. So the date-on-X graphs always show a single point (Nov 27 in the example above).
image leads to image
How can I format the column to show the correct date and time (down to the millis)?
Thank you