Microphone exercises occasionally stop reacting completely
Occasionally, when I get a "Click the microphone and say:" type exercise, I click the microphone, repeat the phrase, click the "Stop" button and nothing happens. From that point, I can repeat the process however often I want and it'll never tell me it couldn't hear me, didn't understand me or let me pass.
The only way to get past this is clicking "I don't want to use a microphone", after which you have to manually go into the menu to turn it back on again. Obviously: very annoying. What could be causing this?