In 2023, most of my accounts had sync problems. This includes My Bank, Fidelity, Discover Bank, and Discover Card. To resolve the issues, I had to rebuild the accounts from scratch. This resulted in losing years of historical data.
In my current Quicken file, I have transactions dating back to 1991. Prior to 2023, I don't recall having any sync issues. I had to spend way too much time fixing all these issues. One of my accounts was working until a Quicken support representative had me take steps to fix another account, and the working account broke. So, after support, I had two accounts that would not sync. I'm not sure I can trust support. I even warned the agent this was wrong before I did it.
I still have a Discover Savings account messed up. It will not sync at all. It appears I will need to rebuild that one as well.
There needs to be a better way to resolve these types of issues without losing data.