For the last year or so, I’ve been using Memrise for several Japanese courses. My main use case is learning in the London tube, which has really bad connectivity, so I upgraded to Pro to be able to download courses for offline use. I was very happy with it until, about a month ago, I replaced my phone for a new one of the same make and model (Google Pixel), and so had to reinstall the app and re-download all courses.
Since that happened, I have been unable to use the app in offline mode for anything involving sound: the sounds just won’t play. The do play when I’m online, though!
If I was to venture an hypothesis, I would say it looks like the app doesn’t download the media when it downloads the course, and then lazily downloads individual media files as it needs them, but I of course I don’t know what I’m talking about.
Help? This has made Memrise pretty much useless for me.