I have two Fidelity Signature Visa credit cards, and neither of them has downloaded anything in October, although a good handful of transactions have posted, according to the card website. There is no error message, just Complete.
I have tried resetting and Link to Existing Account, and that process completes, but still no transactions are downloaded. Quicken inserts one big adjustment entry, apparently trying to get the account balance to match, but it's not the right amount.
If I enter the transactions by hand, it reconciles correctly, but this is bad. If it fails to download, it should kick an error of some sort. And there should be a fix for the error.