NPCs take knockback but player characters don't

[UnImaginative_Games (Max)]

hello
I have a script that uses ApplyImpulse() on a HumanoidRootPart to knockback a character. However, as the title suggests, the ApplyImpulse() only works on NPCs. When I tested the same knockback system on actual player characters, they do not get knockbacked at all. How would I fix this?

-- This is a module
local Module = {}
local RE = game.ReplicatedStorage.Events.Ragdoll
local PS = game:GetService("PhysicsService")

Module.Ragdoll = function(char:Model, timer:number, power:number, direction:Vector3)
	local plr = game.Players:GetPlayerFromCharacter(char)
	if char.Humanoid.Health~=0 and ((char:FindFirstChild'LowerTorso'and char.LowerTorso.Root.Enabled) or (char:FindFirstChild'Torso'and char.Torso.Neck.Enabled)) then
		RE:FireClient(plr,true)
		for _,v in pairs(char:GetDescendants()) do
			if v:IsA'Motor6D'and Module.Check(v.Name)then
				v.Enabled = false
			elseif v:IsA'BallSocketConstraint' then
				v.Enabled = true
			elseif v.Name=="Head"then
				local b = Instance.new("BodyVelocity",char.Head)
				b.Velocity = Vector3.new(math.random(-10,10),0,math.random(-10,10))
				task.spawn(function()
					wait(.1)
					b:Destroy()
				end)
			end
		end
		
		print(power)
		char.HumanoidRootPart:ApplyImpulse(direction * (power * 12))
		char:SetAttribute("Ragdolled", true)
		------------------------------------------------------------------------------------------------
		if timer == nil then
			timer = power / 50
		end
		wait(timer)
		------------------------------------------------------------------------------------------------
		RE:FireClient(plr,false)
		for _,v in pairs(char:GetDescendants()) do
			if v:IsA'Motor6D' then
				v.Enabled = true
			elseif v:IsA'BallSocketConstraint' then
				v.Enabled = false
			end
		end
		char:SetAttribute("Ragdolled", false)
	end
end



Module.Bot = function(bot:Model, timer:number, power:number, direction:Vector3)
	task.spawn(function()
		local H = bot.Humanoid
		bot.HumanoidRootPart:SetNetworkOwner(nil)
		if bot:FindFirstChild'HumanoidRootPart'and H.Health~=0 and (bot:FindFirstChild'Torso' and bot.Torso.Neck.Enabled==true) or (bot:FindFirstChild('LowerTorso') and bot.LowerTorso.Root.Enabled==true) and timer then
			H:SetStateEnabled(Enum.HumanoidStateType.GettingUp,false)
			H:ChangeState(Enum.HumanoidStateType.Ragdoll)
			for _,v in pairs(H:GetPlayingAnimationTracks())do v:Stop(0)end
			bot.Animate.Disabled = true
			
			for _,v in pairs(bot:GetDescendants()) do
				if v:IsA'Motor6D'and Module.Check(v.Name) then
					v.Enabled = false
				elseif v:IsA'BallSocketConstraint' then
					v.Enabled = true
				end
			end
			
			bot.HumanoidRootPart:ApplyImpulse(direction * (power * 12))
			
			if timer == nil then
				timer = power / 50
			end
			wait(timer)

			bot.Animate.Disabled = false
			H:SetStateEnabled(Enum.HumanoidStateType.GettingUp,true)
			H:ChangeState(Enum.HumanoidStateType.GettingUp)

			for _,v in pairs(bot:GetDescendants()) do
				if v:IsA'Motor6D' then
					v.Enabled = true
				elseif v:IsA'BallSocketConstraint' then
					v.Enabled = false
				end
			end
		end
	end)
end

The script that uses the module gives the same arguments to both functions. No matter what number I changed the power to, the ApplyImpulse() never seemed to activate.

Edit: I realised that the force seems to build up, and it only activates when the character dies.

[itsDenDenn (Den)]

This is happening because the server doesn’t have physics ownership of the player’s character, what you will have to do is fire a RemoteEvent from the server to the client that got hit and then detect this event on the client and run part of the code there, for example:

RemoteEvent.OnClientEvent:Connect(function(direction, power)
	character.HumanoidRootPart:ApplyImpulse(direction * (power * 12))
end)

[UnImaginative_Games (Max)]

I knew that the client had access to the character’s properties, but I didn’t know they had access to the physics of the character (if that makes sense). What if I want to check the force that is being applied on the character? Say, I have an ability that requires checking the velocity of the character, how would I check it if the client does not replicate to the server? Since the client changed applied the impulse, the server wouldnt know.