I'm well impressed how quickly you are fixing this. As I would say. You're all over it like a spilt trifle. Thank you. ):0)

If you are a developer could I make a suggestion?

There are 5 stages of words learning(1-4 and learned). Levels 1-2 words are yellow, 3 - yellow + underlined, 4 - only underlined, learned - a word looks like any other known word. It would be great at least to have an option to mark a learned word visually somehow. That's why I leave all the learned words on level four (underlined), but it is psycologically uncomfortable.

And, by the way, there is a glitch whith two overlapping phrases. Both phrases have the same outline, that's fine, but if I click on it I always see "Loading". I ought to click on any phrases' word and then on the outline, only then I see a title "Overlapping phrases" and two phrases themselves.