Welcome to GenVibe. Curious on a few things: Mileage? Are you the original owner? Climate? One of our Vibes is exactly what you have (the other an automatic) and we've had ZERO problems from day one
Does this happen when accelerating or decelerating? Totally unrelated BUT years ago I had an old Chevy truck 250cid "3 on the tree" and 2nd gear would occasionally jump out of gear. It was probably an adjustment issue but I put it off and eventually lost 2nd gear for good. Then had to shift from 1st to 3rd just to drive it. Hopefully it's just a matter of adjusting the shifter mechanism. Keep us posted here