Importing previously exported boards/folders from Cboard show with unknown/strange titles

[mzilak]

1. After exporting the boards from my Cboard account, I tried to import them in Cboard while I am not logged in. All boards/folders imported and the titles in the Boards dropdown are shown ok.
   However, if you go to the Build option, they will be shown with strange titles like WpaZmvDpKQ:
   

After going to the folder through its root board (e.g. Home board -> Food) and going back to Build, this folder will be named correctly (on this screenshot "juha" appeared):

2. After that I logged into my account and imported the same boards/folders (.json file), and most of them appeared with Unknown labels in the Boards menu as it can be seen from screenshot:
   

When I go into some folder from the root board (Home >Food), the title of the folder is right, but if I go to this folder from the dropdown, it is unknown (and not changed to Food):

After logging out and going to Boards, all my previously imported boards are missing. I don't know is this the expected behavior: