Why libby magazine shows unreadable text in chinese?

This happens on web and also android/ipad apps.

I tried to change the system language on ipad, nothing changes.

https://preview.redd.it/03f0o6trx3zf1.jpg?width=1316&format=pjpg&auto=webp&s=e1cd2c43f33d162239c54f55510b70b7e525fc96