You are trying to extract custom reports, but the box to view the Case Category option is cut off, so there is no way to filter by it.
This is a system limitation that shows up when the list items have more than ~20 items (depending on the character size and spacing). As a workaround, use the option to export to MS Excel and then filter based on the Case Category within the Excel file.
You can contact support and request this feature to be developed through an Enhancement Request.
INFORMATION ONLY FOR AGENTS:
- If the customer requests an Enhancement for this, make sure you read the Submitting Product Enhancement Requests KB Article.
- A similar/related Issue was reported before in COTRAC-906 but was concluded as an enhancement.