User blog comment:Kirkburn/Syntax highlighting - helping you read and write code/@comment--20150310204743/@comment-452-20150310205459

I've noticed something similar to this, and just sent similar screenshots in via Special:Contact.

Good to know it's not just me!

For me, it happened when I was editing a file embed. (Also, it was inside a template, unsure if that's related.)

The problem in my case is that the highlighting isn't scrolling correctly, which is similar to what your screenshots show: I don't know if you noticed, but the highlighting is in the same pattern on each, just not over the correct words.