Nope. Even after disabling the headers, Xcode still does the same (freezes while scrolling code). This makes the code development a nightmare. I keep reporting to Apple the crashes but this has been going on for years, so I guess there is not and there will never be a solution. A code editor that crashes/freezes while scrolling the buffer simply fails the basics and is unacceptable. Apple should learn from Emacs, created in 1976, and since then working perfectly (does not "crash" while a developer types code). Time to move to VsCode.

Confirmed that disabling header seems to work for me as well, in the sense that I have not (yet?) experienced a freeze since then. Usually Xcode was freezing for me 2 or 3 times per day in a similar way described in this post, all the time while scrolling up C++ code (containing many MARK) with the Magic Mouse, so finger crossed...