I just came back after about a week to complete some more challenges, but the editor is suddenly all messed up. It doesn’t put the cursor where I click, it randomly skips lines when I use the up and down keys, it randomly skips half of a line when I use left and right, etc.
Update: the problem goes away once I change my browser’s zoom level to 90% and back to 100%, but it’s a little annoying and unnecessary to have to do this on every new challenge.
I’m having the same problem in Chrome 53.0.2785.113 on Win 7 Ent. If I click in the editor and start typing, the cursor hops down a line or two which jacks up syntax elsewhere. It’s a small pain right now.
It’s difficult to fix because the editor was not created by freeCodeCamp and is maintained by one person. You can read more and suggest workarounds in the issue above.