Mail 'All Inboxes' preference not sticking
I've been having the same problem with IOS Mail for months. I have several email addresses, including iCloud and Gmail, all managed via the Apple Mail client. My default setting for receiving mail is 'All Inboxes'. For some reason this switches intermittently, without warning to the 'Gmail' inbox. Everything is fine for a while after I switch back to 'All Inboxes'... until it happens again. Does anybody have any idea why this is happening? For reference it's an iPhone XR running iOS 14.7.1.