went back to the factory this summer when the section next to the tip exploded after setting the hook and lifting the rod on a striped bass. I concluded that it was probably the result of nicking that section with a clouser sometime earlier.
As Dave said, highsticking fish is a no-no. If you are breaking the tip section, Sage has a replacement tip policy. For a fee, $165 for an Xi2, they will supply you with an extra tip and bag with an extra section.