A. 1. Ensure that all accounts are linked properly in the app settings. Go to Settings > Accounts and check if all accounts are listed. 2. If an account is missing, try to re-add it by selecting 'Add Account' and following the prompts.

B. 1. Log out and log back in to refresh the account list. 2. If the issue persists, check for any updates to the app that may address this issue.