In Xcode 13.0, after doing a side-by-side code review (by clicking on the double arrow icon at the top right of the editor), and then turning code review off (clicking that icon again), I'm still left with the blue text highlights showing the changed lines. The only way to get rid of the highlights is to select a different source code file in the project navigator and then return to the original file.
Is it just me, or should I submit a bug report via Feedback?
