That's not quite right. The court decided against ruling those votes invalid because the law had been in place for a year without any legal challenge, which only happened when the election didn't go their way:

Unsatisfied with the results of that wager, they would now flip over the table, scattering to the shadows the votes of millions of Pennsylvanians,” Justice David Wecht wrote following the election. “It is not our role to lend legitimacy to such transparent and untimely efforts to subvert the will of Pennsylvania voters. Courts should not decide elections when the will of the voters is clear.”

The question is of course, why did the Republicans wait until after the election to file a lawsuit? Why not do it the minute the law was passed, or at least before anyone voted? Very suspicious.

That's not quite right. The court decided against ruling those votes invalid because the law had been in place for a year without any legal challenge, which only happened when the election didn't go their way:

Unsatisfied with the results of that wager, they would now flip over the table, scattering to the shadows the votes of millions of Pennsylvanians,” Justice David Wecht wrote following the election. “It is not our role to lend legitimacy to such transparent and untimely efforts to subvert the will of Pennsylvania voters. Courts should not decide elections when the will of the voters is clear.”

The question is of course, why did the Republicans wait until after the election to file a lawsuit? Why not do it the minute the law was passed? Very suspicious.