Different positions on different clients via knockback system

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#1

I have an issue that characters’ positions are different on different clients.

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Two pictures were taken at the same time and on different clients.
Before this issue comes up I punch my friend so he knockbacks.I used BodyVelocity (since LinearVelocity lags).

local bv = Instance.new("BodyVelocity")
bv.MaxForce = Vector3.new(math.huge, 0, math.huge)
bv.Velocity = HumanoidRootPart.CFrame.LookVector * 10
bv.Parent = enemyHRP

And the problem is that I can’t deal him damage (after one punch) since he is just too far away. However he can hit me.

#2

Is the code ran in a LocalScript or a ServerScript?

If the code is ran in a LocalScript, then you need to change it to a ServerScript.
This is because in a LocalScript, only the client that executed the code sees the changes, different clients do not register the changes.

#3

Hitboxes, knockbacks etc. are being handled on the server. Client just fires an event when they punch