Javascript challenges not registering after completing them

Complete javascript challenges and get them correct submit them and does not save the submit after going back to cirruculem and refreshing the website on google chrome. Happen to anybody else or is it just my browser thoughts?

challenges, or lessons? From what I’ve heard, the last five of each “track” are challenges, and they are the only ones saved on FCC. The rest off the track are lessons, and while your browser will cache them for a while, unless you save it using the “Download my Solution” button, they will be lost.

I mean lessons and what is download my solution

When the dialog pops up to let you advance to the next lesson, it also shows a button to download your code.