The Warsaw Pact countries have a 50-year history of being Russian provinces in all but name. Should they be ceded to Russia as well?
The Warsaw Pact countries were non-Russian peoples controlled by the USSR, much like Tibet is controlled by China.
The areas in question were Russian for hundreds of years, which is why they are ethically and linguistically Russian today. A transfer of administrative duties during the Soviet era doesn’t change that, nor does it make the situation analogous to Poland being controlled by the USSR.