The streak system has a bug

I was checking a lesson and once I finished checking the lesson I found this

I don’t know 321 and I just checked it in a minute or 2 just took a look

Have you checked about all the pages of the lesson? While turning pages, you could have marked blue words to known, I don’t know if this setting is set on by default nowadays. Stay here for a while to judge what is a bug on LingQ and what’s not. Spoiler alert: you’re never gonna figure this out, in fact, it complicates furhter as time goes ;]