Hex Bolts Skin Not Unlocked

Last night I finally managed to get 35 points into the “Survival” guardian tree but the hex bolts skin did not unlock. the burning bright skin did not have this issue.

Did you “unlock” it while on a different character? I had the same problem when switching characters after having unlocked another guardian rank skin. I had to exit to the menu and load in again with each other character to make them show up for each one!