Maurice's waterfall collar cardigan

Maurice's green waterfall collar cardigan. very cool design on the back dark green. beautiful. 👉 there is an open spot in the knitting on one shoulder. I've only worn this a couple times and there was no damage done to this as well as no pulls or cut threads. so I'm not sure how all this loosened up. but anyone that can sew on a button I'm sure will be able to fix this. I'm just not a fan of the waterfall collars so I'm not going to take the time to fix it.