8 months post- op, after receiving a FUE hair transplant some hairs remain thin and light, could the grafts be damaged?

Im 8 months post FUE, density is good but the high percentage of hairs that remain thin and light colored is a bit alarming. I know more maturation comes but i feel like many of these hairs have been thin and light for months. And some are very light and thin. I have read that transected grafts can survive and grow weaker than normal, but how likely is this to happen? Is it a rarity or could someone have many damaged grafts grow out permanently weak and thin?