Target Language Audio Disappearing (Danish)

I am learning the 500 most common words in Danish and I think I’ve gotten up to roughly 125 so far. Around this 125 words, I have started to notice that new words do not have audio along with them and so I do not know how to pronounce the words. Is this a bug or does the danish lesson not have audio for those new words?

It would help if you posted a link to the course.