Putin begging to be invited / offering to western pro-european Ukraine to protect them from Poland instead of the usual direct NATO/Poland threatening was not in my bingo card...
Attacking Poland would be a stupid thing to do even if Poland wasn't a member of NATO.
The Russians can barely fight a war on one front, opening a second front would be insanely stupid.
Poland has all the same weapons Ukraine has, plus an air force capable of hitting the broad side of the barn.
What am I saying of course they're going to do it. This is the country that thinks that orbitally dropping unguided bombs constitutes an effective military strategy.