All Attachments to any Transactions over a Month old are gone plus other Issues

I've just noticed that, since recent updates, attachments to any transactions more than a month old are missing! They're all gone! I've had recent problems entering a transaction and attaching a receipt. The entire transaction disappears when I hit SAVE. If I enter the transaction and save it, and then go back and add the attachment, that works. I'm really upset about the history of all my receipts/invoices/attachments - GONE! I have not had to restore my file from a backup, so that's not the issue. I do sync to the Quicken cloud file. My files are on my C drive, I use Windows 11. HOPE SOMEONE CAN HELP!