Animation loops differently in-game than animation editor

Help and Feedback Game Design Support
1

Hello, I made an animation in the animation editor that loops and makes the character spin around infinitely. It works fine in animation editor, but in-game, it will reverse each loop.

This is the animation script i have in the npc:

local animation = script:WaitForChild("Animation")
local humanoid = script.Parent:WaitForChild("Humanoid")
local anim = humanoid:LoadAnimation(animation)
anim:Play()
anim:AdjustSpeed(.25)