Linear Velocity doesn't work while character is on ground

[ItzBloxyDev]

I am attempting to create a dash but there is one problem. Whenever the player is not in the air as they use the dash, the dash is very limited in the length you go. Barely working.
Here is a snippet of that code:

local humanoid = character:FindFirstChild("Humanoid")
local humRp = character:FindFirstChild("HumanoidRootPart")
if humRp and humanoid then
	local velocity = Instance.new("LinearVelocity")
	velocity.Attachment0 = humRp:FindFirstChildOfClass("Attachment")
	task.spawn(function()
		while task.wait() do
			if not velocity then break end
		    velocity.VectorVelocity = humRp.CFrame.LookVector*110
		    local ray = workspace:Raycast(humRp.Position,humRp.CFrame.LookVector*.1)
			if ray then
			      velocity:Destroy()
			      mation:Stop()
			end
		 end
	end)
		velocity.MaxForce = 100000
		velocity.Parent = humRp
					
		game.Debris:AddItem(velocity,.1)
					
end

any help is greatly appreciated

[anirudh851 (Ani)]

Turn on humanoid.PlatformStand else the humanoid will always override any forces being exerted in normal state