No, sorry they haven't. After having a supervisor look at my computer, he sent my info directly to the Apple Engineers.
I never heard back. However, I traced it myself back to my TIME MACHINE BACKUP---for whatever reason, a string of backups, the download folder itself had a "white" page icon with a 'LOCK" icon in the bottom corner of it. I'm assuming that's why the download folder didn't migrate over onto my new Mac Book Pro 16inch. So, I erased my new computer, and migrated off of an OLD backup, from a year ago, which DID have the download folder in it, (Not just the icon of it) and it worked. SO---there was something about the backup. I did lose a year's worth of files, for I keep a ton in my download folder for easy access. BUT, at least I have the download folder again--:) Wish I could be more help---or someone at APPLE could be--:)