Really? Why?
Because.
Russia has nothing to gain from Poland, who is now the NATO puppet.
BTW, Poland is dependent on Russia for 70% of its energy needs. Of course, they could stop buying fuel and freeze to death, it’s their absolute right.
Unlike the Crimea, there are no easily-exploitable natural gas fields in Poland. They rely on their own coal and Russian gas.
Russia is lacking the economic liberties and freedoms in which domestic industries thrive. It’s an oligarchy. And like most dictatorships it is dependent upon exporting natural resources. It needs to acquire and export resources and, if possible, influence the market for the capital to run the government.