Yes, this is expected. The account list appears immediately, and the balance, spend, and campaign columns fill in gradually, in small batches, with a loading effect on the cells that haven't arrived yet. Accounts with a possible problem (failed payment or prepaid) load first, so you see what matters right away. If you type something in the search, accounts matching the term jump to the front of the queue and load first. If you see Error loading accounts or Failed to update, click Try again or Refresh. This indicates a temporary communication failure, not that your accounts disappeared.