Did a clean install of Mojave tonight and after importing my mailboxes into the Mail app from High Sierra, it's nested the majority of my e-mails in my "On My Mac" folders into one conversation (3000+ e-mails). Unchecking "Organize by Conversation" shows them all individually but once I re-open Mail it combines them again. I've tried rebuilding the mailbox, deleting the Envelope files in MailData, no go.
I've already submitted feedback to Apple but has this happened to anyone else? Or even better, know of a fix?
I've already submitted feedback to Apple but has this happened to anyone else? Or even better, know of a fix?