Flat sparkline in scorecard, related to element height

[mrh1987]

I have noticed that sometimes sparklines in a scorecard element show a flat line. This seems to be related to the height of the scorecard element. When I increase the height of the element, the sparkline will eventually show. This suggests it's not a data issue.

I provided an example in the screenshot. The 'Impressions' metric works fine, but for the metric 'Url Clicks' it shows a flatline until the scorecard reaches 250 pixels in height.

The obvious fix is to scale the elements until they show the sparkline, but this causes other issues like misalignment between multiple scorecards on the same row, or overlapping elements.

What can I do to fix this? Or is this a bug in the application?

[lookergogo]

For anyone facing a similar issue, I changed the field calculation to running sum and it seemed to fix this issue.