Grasping Vines incorrectly reduces twice as much movement speed on the first stack.

Testing via Natural Affinity + Inextricable Fate to gain up to 20 Grasping Vines, 10 each.

Damage reduction works properly up to 20 vines.

Movement speed debuff has incorrect scaling (numbers in character stats):

11+, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0
-87, -84, -74, -64, -53, -43, -32, -22, -12, -1, +9, +30
-84, -81, -68, -55, -42, -30, -17, -4, +9, +22, +34, +60

Grasping Vines is supposed to be 8% less movement speed per vine. However, going from 0 to 1 stack lessens movement speed by 16% instead. The rest of the stacks correctly reduce by 8% (each stack offset by the original extra 8% up to 88%).

At 11+ stacks, it strangely reduces movement speed again, but not linearly, and additional stacks past 11 will not further reduce movement speed.

Required fixes:
1) correct the extra 8% less movement speed from the first stack.
2) fix abnormal scaling at 11+ stacks. (unless this is intended, and is capped at 90% less movement speed - could use reminder text).