Bro . I had the same issue. This is because of the electric change in resistance in fuel pump. Got the fuel pump changed which was covered up by warranty. Now the issue is solved.
had this few times, same click sound.. it’s because of low battery charge no one uses 650s daily (not a sane person in India), and due to sitting for days battery get drained… solution1 - get battery charged from mechanic solution2 - jump start bike by dragging in 1st gear and release clutch (low cc bike get jump start in 2nd gear but this beast jump start in 1st gear)