aalenfae said:

Even so, it's a problem. Just a forced harmonization, I think. The only way to really make it effective would be to have Padme live long enough to spend time with Leia before she dies. Killed would be more dramatic.

BUT! This is a change that's impossible with the source material, so I think it will have to remain an inconsistancy.

I looked up the specific quote from Return of the Jedi, and it seems like I was wrong as Luke asks something like "Do you remember your mom, your real mum?"

After which Leia thinks hard and then says yes...

So it's a mistake in the prequel to have let Padme die during the birth.