Yes. The employer grants RSUs at price XXX. which goes onto the w-2 as income the year they issued (not vested). When they vest; taxes are withheld by the broker before depositing remainder into account (once deposited your sale drives additional cap gains/losses). The withheld amounts are NOT reported on the brokers tax reports; and only available for each vest confirmation...
in short words, no feedback loop after company issues the RSUs and records as income
