Yup! It's absolutely possible to get shut down during ST. Happens to me plenty. Usually because I popped it at the wrong time, or just got hit with a rock to my scissors super. This is in stark contrast to the pre nerf sunbreaker, who was hard AF to get down. I do agree perhaps a small tweak is in order. Either to the length of time or perhaps the chaining capabilities. But overall SC is not as bad as Sunbreaker was.