Chinese characters (and others) are not legible

Hello,

i try to use memrise to study chinese but on both of my android devices the app shows the same bugs. The charakters are not visible because they are replaced by letters and sometimes boxes that take the place. It could be that the devices dont have the fonts, but on the other hand one of my devices have a chinese firmware and I read that others here had simmiliar problems. Please help me if you know what to do.

By the way, log out and in again into the app did not work.

Try to update to the last version. That has happened to me before and it was that my Memrise was out of date