SharePoint list exported to excel not showing the information in the columns

Hi , I have SharePoint list to track issue ticket in my organisation, whenever someone updates the ticket they will provide feedback about the issue under feedback column. When I export the list to excel I notice for few rows in feedback column  are blank in excel, but when I checked in SharePoint I can see some feedback is updated by the user. Can someone help me on this . How I can make the all feedback to be shown in excel export as well.