I track four Schwab investment accounts in Quicken Classic Deluxe for Windows, v. R53-32. All four show up on the Investing tab, which I have customized to show Account Name, Market Value, Amount Invested %, Etc. Using Today's Date, three of the accounts (an IRA and two brokerage accounts) show correct market values. The fourth account, a ROTH IRA, displays a Market Value about $2500 under actual ("actual" being Schwab's amount). I suspect the "Amount Invested" is wrong also. It appears to be much too high. When I click on the ROTH account from the Investing tab, the Register opens and shows the correct Market Value. A Quicken Net Worth Report shows the correct Market Values for all accounts, as does a Quicken Portfolio Value Report.
I made comparisons of the Investing screen and Net Worth reports using several older "As of" dates, and determined the problem developed sometime after 9/1/23. A one-to-one comparison of transactions, Schwab vs. Quicken, from 9/1/23 to today, shows no discrepancies.