German Courses Android App - No sound and Prounanciation Bugs

I have serious problem with Memrise on Android. Some words I can not hear, so many times I have to guess what is word that I am supposed to click, since there is no sound.

Also Pronunciation section, if a sentence is a little bit longer it can not pick up, and I get “something went wrong. Give it another go.”.

Is there any fix for these things? Does Memrise plans to do something?

I never saw an app that you pay with this many bugs.