[BUG] old sentences being highlighted as new

Lessons which I have already completed now show greater than zero new words. When I click into the lesson I see that a few random short sentences (2 words) have been highlighted as blue.

It is an odd bug considering that usually when we see new content for the first time it is the words which are highlighted as new, not the sentences. I’ve never seen.

We are familiar with this issue and we are working on it. We will have it fixed.