I compare my holding and balances with the brokerages using the Online Center frequently. My Schwab account uses SWVXX as cash. Quickens register balance correctly includes the value of SWVXX in cash. It matches the $19,347.54 total cash on Schwab's website. But the Online Center omits the value of SWVXX and only shows the actual cash of $1,867.58.
It is apparently a Schwab issue as the Online Center correctly shows the total cash in my Fidelity accounts. They use FDRXX and FCASH.
I updated Quicken to R69.17 build 27.1.69.17 yesterday. I'm quite sure this didn't happen in the previous releases of Quicken.