[HELP NEEDED] RunAnimation stops when jumping?

Ok so. I made a shift to sprint script with a runanim and a camera zoom back. But when i jump(while im running) the run animation stops and the normal standard roblox animation for running comes... can somebody please help!

Here is the code:

local UIS = game:GetService('UserInputService')
local Player = game.Players.LocalPlayer
local Character = Player.Character
local playerModel = script.Parent
local humanoid = playerModel:WaitForChild("Humanoid")

UIS.InputBegan:connect(function(input)--When a player has pressed LeftShift it will play the animation and it will set the normal walking speed (16) to 35.
	local CurrentTime = tick()
	if input.KeyCode == Enum.KeyCode.LeftShift then
		
		if humanoid.MoveDirection.Magnitude > 0 then
			local ts = game:GetService("TweenService")


			local info = TweenInfo.new(
				1, -- Time
				Enum.EasingStyle.Back, -- EasingStyle
				Enum.EasingDirection.InOut, -- EasingDirection
				0, -- RepeatCount (when less than zero the tween will loop indefinitely)
				false, -- Reverses (tween will reverse once reaching it's goal)
				0 -- DelayTime
			)
			local tweenObject = ts:Create(game.Workspace.CurrentCamera,info,{FieldOfView = 120})
			local normal = ts:Create(game.Workspace.CurrentCamera,info,{FieldOfView = 70})
			tweenObject:Play()

			Character.Humanoid.WalkSpeed = 25
			local Anim = Instance.new('Animation')
			Anim.AnimationId = 'rbxassetid://5984101062'
			PlayAnim = Character.Humanoid:LoadAnimation(Anim)
			PlayAnim:Play()
		else
		
			if humanoid.MoveDirection.Magnitude == 0 then
				PlayAnim:Stop()
			else
				PlayAnim:Play()
			end
			
		end
		
	end
	
end)
UIS.InputEnded:connect(function(input)
	if input.KeyCode == Enum.KeyCode.LeftShift then
		local ts = game:GetService("TweenService")


		local info = TweenInfo.new(
			1, -- Time
			Enum.EasingStyle.Back, -- EasingStyle
			Enum.EasingDirection.InOut, -- EasingDirection
			0, -- RepeatCount (when less than zero the tween will loop indefinitely)
			false, -- Reverses (tween will reverse once reaching it's goal)
			0 -- DelayTime
		)
		local tweenObject = ts:Create(game.Workspace.CurrentCamera,info,{FieldOfView = 120})
		local normal = ts:Create(game.Workspace.CurrentCamera,info,{FieldOfView = 70})
		normal:Play()
		
		Character.Humanoid.WalkSpeed = 9
		PlayAnim:Stop()
	end
end)