I quite frequently (most reviewing sessions) run into audio tests (the ones where the user is presented with three audio snippets, and has to pick the one corresponding to for the word on top) where only one or (more frequently) two of the options load and can be played.
Now, if the missing one is not the solution then that’s a minor irritation, but there’s obviously a good chance that the missing one is the one that I would need to pick, and the app does not let me pick the speaker icon if there’s no sound behind it, which means I cannot continue.
Workarounds are to either abandon the review session, and try again, or to disable audio tests, neither of which is ideal…