Since the update the combined inbox is set as the default. So I thought I would give it a try. But the collection of new messages isn’t working properly. I set all my mail accounts to manual fetch mail. When I swipe down in the combined inbox menu, it seems that the mailboxes are polled for new messages. But in most cases no new messages show up. Then I go to the inbox of a particular mail account, swipe down and new messages are coming in. Same applies to other mail accounts. In a few cases fetching new messages in the combined inbox works, but most of the time it doesn’t.
How can I solve this behavior?