On the home page, tap offline content icon in the second row
This will take you to the offline user content icon for the States.
Tap this icon.
All the States will now be displayed.
Select the state that has lost the comments and try to download if no luck, delete all content for that state there is a small red bin that you need to tap and you will be ask what content you wish to delete, delete all, then go back and reload the content make sure you are on Wi Fi as there is a lot of data to download it does seem to be very slow.