Messages Threads "Info" Photos and Attachments Not Showing Up On iOS 14.2
Two days ago I upgraded to the iPhone 12 Pro Max from my iPhone 11 Pro Max. I upgraded the new phone to iOS 14.2 to match the version of my final Finder backup of my old phone and promptly restored it from the aforementioned Finder backup.
Everything looked fine except when pressing "Info" on a Messages thread — the aggregated Photos and Attachments are not showing up for any thread except ones which have received a new Photo or Attachment since I began using the new phone. The content for every thread is still there if I simply scroll backward in time and look for them manually. Additionally, I can see through "iPhone Storage" in Settings that the Messages data (many gigabytes) is still there and not missing.
iCloud for Messaging is disabled in Settings as I have always had it.
Things I have tried:
• Restarting my iPhone
• Waiting 24-48 hours
• Turning "iMessage" off and back on in Messages Settings
• The above followed by a restart
• Turning "Show App In Search" and "Show Content In Search" off and back on in "Settings > Siri & Search > Messages"
• The above followed by a restart
Although a minor issue, it is still frustrating and would appreciate any advice, thanks.