"She eats an apple."
Translation:Ona je jabłko.
Ok, now I know jem is first person and je is third, then why Duolingo is considering jem as correct but adding "you made a typo"? Maybe is because I had a wrong answers streak before and is doing it so I don't feel bad?
I don't know. It would make more sense to reject it completely if it's another existing form...
The Duolingo algorithm likes to put a random sentence from the previous skills into a totally unrelated one sometimes.
No, it isn't, it only happens in the rare examples where all the forms (in singular, at least) are identical.
However, I believe that you meant Accusative, because here we have Accusative. And yes, it's identical and it's identical for all (?) neuter nouns.