AI generated audio in the catch-up lessons is problematic
The catch-up lessons are a good idea but they're a bit late. More disturbingly, they contain listening exercises that are not longer even correctly pronounced, presumably the new AI generated content.
Course: Japanese
Issue: the subject marker は, which is also just the hiragana letter は in general writing, is no longer distinguished by the audio generation software, so it's now just pronounced as the letter, "ha" instead of "wa", usually also with a distinct pause around it, which screws up the sentence.
So what's my constructive criticism? You're teaching bad pronunciation and incorrect cadence. I really hope it's just those - presumqbly quickly cobbled together - catch-up lessons and not the entire course that's gone. That would ruin the experience thoroughly.