Red blinking lights after each new impulse???

So there are these red lights after each audio+visual sign.

I guessed these are marking which one would have been the correct response.

Still very often they look to be not the correct ones.

What are these signs?

Why are they blinkig up?

Thx.

Ok what I meant was the --> show feed-back on error setting. :-)

Can someone answer this please, the red flash after the audio/ position keys is annoying and distracting