View menu resets to 'Organize by conversations' in Smart Mailboxes
I have recently upgraded to Big Sur and find that all my smart mailboxes repeatedly revert to 'Organize by Conversations'.
I never want to view by conversations, so this is a major distraction. I have nothing checked in Mail Preferences/View/View by conversations.
Is this a bug, feature, a preference corruption (and If so, which?) or something else I am missing?
Chris
iMac Line (2012 and Later)