Gravel King slick tires

I just got some Gravel King slicks in a size 700 x 38 and running them tubeless. I like them better than my last set of tires until I got a slash in the rear tire on pavement. The sealant was having a hard time with slash as I tried to get back home. Today bombing down gravel hills all I could think about was the possibility of getting another slash at speed. Anybody else have issues with these tires or was this just a fluke thing? Any other good slick tire recommendations around the 38?