I have the same issue. Using double vowels to replace the accents in some words gives you a wrong answer. So far I've encountered this issue with the word "Woman" (Aabra is always flagged wrong) and in this particular exercise, the word Syyri is also flagged wrong.
I just copied and pasted both of those into my internal debugging window and both came back as being correct. At this point I can't do anything else; it's out of my hands. I'm going to have to ask for assistance from Duo staff.