Is there a better way to detect which side of a door a player is coming through?

I made this script that's supposed to, at random, close a door that the player is about to walk through by itself. I did this by having 4 total parts, two of which are the actual door closing parts, and the other two acting as "detectors" to see what side the player is coming through. I then put which side they're coming through in a value, which the random door closing script can read. It looks something like this:

function AutoClose(part)
        if part.Parent:FindFirstChild("Humanoid") then
            if Open == true then -- if door is already opened..
                if not Debounce2 then 
                Debounce2 = true
                local closechance = math.random(1, 6)
                if closechance == 3 then

                -- do stuff to close door

                    Open = false
                    CloseSound:Play() -- "closesound" being another sound 
                    script.Parent.Door.DoorError:Play()
                    Door.Transparency = 0
                    for i,v in pairs(Door:GetChildren()) do
                        if v:IsA("Decal") then
                        v.Transparency = 0
                        end
                    end

                    for i = 1,(Door.Size.z / 0.20) do
                        Door.CFrame = Door.CFrame + (Door.CFrame.lookVector * 0.20)
                        wait()
                    end
                end
            end
        wait(5)
        Debounce2 = false
        end
    end
end

-- if they're near the front...
script.Parent.SCP079partFront.Touched:Connect(function(part)
        if script.Parent.PlayerLocation.Value == "front" then
        AutoClose(part)
    end
end)

-- if they're near the back...
script.Parent.SCP079partBack.Touched:Connect(function(part)
        if script.Parent.PlayerLocation.Value == "back" then
        AutoClose(part)
    end
end)

The script for sending which side they're going through looks like this:

script.Parent.front.Touched:Connect(function(part)
    if part.Parent:FindFirstChild("Humanoid") then
        script.Parent.PlayerLocation.Value = "front"
    end
end)

script.Parent.back.Touched:Connect(function(part)
    if part.Parent:FindFirstChild("Humanoid") then
        script.Parent.PlayerLocation.Value = "back"
    end
end)

This works almost perfectly, although there's a small problem; if the player goes and opens the door, but then walks back from the same side in which they came, there's a chance the door will close even though they weren't walking towards it with the intention of going through. This is a pretty small problem, but nonetheless I was wondering if there was a better way of detecting if a player is about to walk through an open door.

In case it helps anyone familiar with SCP, I'm trying to replicate that thing SCP-079 does when he auto-closes a door you're about to walk through (in SCP: Containment Breach).