I have strange problem with audio test (with 3 button to select a proper pronunciation).
All buttons play the same audio file…
If I’m not wrong there should be three different files - I have no problem to pass the test - I’m always right 
IPhone SE
iOS 1.01
system language: english
location: Poland
Memrise last version
This won’t fix your issue, but if you want to disable the audio tests, there’s an option that lets you do that 
It is old unsolved issue 
Please add your voice also there
It frustrated me so much I stopped using memrise and started using Anki
instead.
I find I learn new vocab faster - I liked Memrise learning pattern but it
is often too slow.