Problem Known Words Count

Why are known words added to the word count after completing a lesson, although it didn’t added any words to known and lingqed all words so that there aren’t any unkown words left?

I don’t want to artificially increase my words known and / or change the words status after completing a lesson. Is there a way to fix that? Am I doing something wrong?

I didn’t have that problem before the update to Lingq5.

We are familiar with the problem (invisible blue words issue) and we are looking into it. We hope to have it solved soon.