Yup, similar problem here.  I connect to a number of different accounts with the same bank.  This morning I successfully downloaded from all accounts.  One hour later (after I had done a number of transfers) QB decided to only download from a couple of accounts and is just hanging there (not downloading) from the other accounts.  Can QB figure out what is wrong?  Of course not!  This means I cannot close the accounts for the month.  It's just one of the many things I have come to hate about the service.  I now laugh cynically when I see the adverts telling us all how wonderful Quickbooks is.  Pretty much all the accounting firms I speak to have the same opinion too.  Come on guys, just fix it, will you.  This is money we are dealing with not some scumbag social media website!