Thank you for raising your concern here in the Community, @sa1212. We know that this has been challenging you in tracking your bank transactions. We're always on your side behind these circumstances. Moreover, we acknowledge your effort in refreshing the bank connection and manually uploading the transactions. This time, allow us to help you.
First and foremost, we'd like to know if there are bank errors you received. To help us further navigate the root cause of the issue.
In the meantime, let's log in to your bank website and see if there are updates or issues in the notification lists. If your bank is making a change, you might need to upgrade your bank connection since this could be the reason the transactions stop flowing into QuickBooks. Feel free to read this article for more info: Reconnect your bank account in QuickBooks Self-Employed.
For future reference, you can read this article to help you manage your bank transactions:
Let me know how it goes. We want to ensure that you're able to fix the issue. Click the reply button below, and we'll answer you as soon as possible. Take care.