Previously downloaded cards no longer downloaded

We have the newest Yoto mini and had all the cards downloaded before we left on our trip. It worked great while travelling. We linked it to my parents wifi and it worked there as well but travelling home we noticed all the cards were no longer downloaded. Does anyone know why this is? Was it because we joined a new wifi? A couple cards we played at my parents were downloaded so luckily we had a few stories to make the trip. Do we need to redownload every time we leave wifi? Any tips? Thanks!

Edit: Response from Yoto help AI: “However, what might have happened is that joining a new WiFi network could have prompted the Yoto Mini to manage its storage, potentially leading to some lesser-used cards being replaced by recently accessed ones. To prevent this in the future, ensure your player remains switched on and idle for a bit after you remove the cards, which allows all the content to properly download and settle in the memory. Also, make sure to check the download status of your cards through the Yoto App under Players > Settings to confirm if they still need to be downloaded.” This is kind of a non-solution because we didn’t add any new cards…. Just played the ones we already had.