This happens when you go through the lesson too fast, or in timed practice when you just type a random letter and the press enter really fast, changes the bar grey and gives you infinite time...
It happens to me sometimes. Either a glitch or bad internet connection.
I don't see the glitch?
I don't see the glitch either
Look at it again. There is a caption telling what it is.
I gotcha now. I encountered this multiple times.
Where's the glitch?