Apple Mail - Smart Mailbox
Adding iCloud Inbox + Gmail Inbox works only on initial setup for a smart mailbox
After closing the Mail app and coming back later the smart mailbox will then be populated by two iCloud Inboxes.
Any attempt to change it back to iCloud + Gmail Inbox results in the duplicated iCloud immediately.
Question being: how can I have a smart mailbox keep the distinct Inboxes?
MacBook Air 13″