SYMPTOM:
When viewing a widget in Flash mode, it displays normally.

Then export it to PDF.

The widget is replaced by graphs or grids.

CAUSE:
It is only supported to export widgets as Grid/Graph, Placeholder or Hidden to PDF.

Options to export widgets as Grid or Graph, Placeholder or Hidden can be chosen in Properties and Formatting of a widget.

For detailed information, refer to Strategy 9.4.1 Product Manual Dashboards and Widgets Creation Guide P.258
WORKAROUND: