Issues with Missing Data in Content Engagement Report Analysis

Hi , I am making a content engagement report for my client , where I am seeing the different segment data ie.Marketing channel,brand name ,Page Title and seeing how many page views and number of users performed that event,but for some segments I have not seeing any data but after viewing the event in the event section, it is showing that the event has triggered but it is not reflecting in the mixpanel reports ,Could you please let me know why it is happening:https://mixpanel.com/s/387xRd