For me, writing is a linear process. I cannot jump ahead and write future scenes if I’m stuck because the unfolding of a story is so organic that unexpected things happen along the way. New characters can come into the fold, the plot may take a different direction or some scenes may no longer feel necessary. None of this may happen if you begin to time-travel.
Of course, writers are the creators of their own worlds and ultimately can time-travel if they want to (indeed, it may be part of the plot). But from experience, I have found that I never fully stick to my plan as my story comes to life on the page.
I tend to stay true to the main essence of the plot, but often the best parts of my prose come from nowhere. So travelling from A to B, from beginning to end, is the way that I operate. No chopping or changing, no jumping ahead to future scenes, just staying there with my characters from the first page to the very last.