Hi Tim,
If the Pivot view is cut on the dashboard itself, this could be the reason. For Pivot and Table widgets the image will include all of the columns that were rendered in the dashboard, not just the columns that were visible on the screen. Since Pivot can be set to have a really huge number of rows, we do limit the height by the visible container size during exporting
It looked fine on the dashboard itself, only the image download has the problem.
Visible container size - The bug happens even when there are few rows. E.g. in the picture below I filtered to just one row and it still happens.
