Help with airship movement

Help and Feedback Scripting Support
1

Hello, I’ve been developing with others on a survival game project that involves airships that I helped specifically code in and am having issues regarding its movement. For whatever reason, despite it working as normally with 1 player, whenever there is more than 1 involved and nearby said airship, unexpected behavior occurs, i.e.; the ship tends to glitch out and attempt to move back to its original position where the owner of it placed it down (the game uses a building/structure placement system and airships use this system), and I have no idea why.

As far as I am aware, I have tested this with 2 clients myself in studio and the position of the ship when moved from its original position seems to be seen correctly by both clients, but again is only changed when the non-owner of it gets nearby/drives it instead. I am using a local script to implement mobile controls in the future with gui buttons and have a feeling this is the reason why, however am unsure on how to go about making it non-local.

Code in question:

local UserInputService = game:GetService("UserInputService")
local player = game.Players.LocalPlayer
local character = player.Character
local humanoid = character:WaitForChild("Humanoid")
local seat = humanoid.SeatPart

local Einput = false
local Qinput = false

--------------------
-- VERSION 0.0.2A --
--------------------

UserInputService.InputBegan:Connect(function(input, gameProcessed)
	
	if seat ~= nil then
	if input.UserInputType == Enum.UserInputType.Keyboard then

		if input.KeyCode == Enum.KeyCode.E then -- descend
			Einput = true
			while Einput == true do
				wait(0.1)
				if seat.Parent.MainPart.BodyPosition.Position.Y <= -200 then
					seat.Parent.MainPart.BodyPosition.Position = Vector3.new(0,-200,0)
					if seat.Parent.MainPart.BodyPosition.Position.Y < -204 then
						warn("Position of airship is abnormally low!")
					end
					else
					seat.Parent.MainPart.BodyPosition.Position = seat.Parent.MainPart.BodyPosition.Position - Vector3.new(0,1,0)
						
				end
			end
		end
		if input.KeyCode == Enum.KeyCode.Q then -- ascend
			Qinput = true
				while Qinput == true do
					wait(0.1)
					if seat.Parent.MainPart.BodyPosition.Position.Y >= 400 then
						seat.Parent.MainPart.BodyPosition.Position = Vector3.new(0,400,0)
						if seat.Parent.MainPart.BodyPosition.Position.Y > 404 then
							warn("Position of airship is abnormally high!")
						end
						else
						seat.Parent.MainPart.BodyPosition.Position = seat.Parent.MainPart.BodyPosition.Position + Vector3.new(0,1,0)
							
					end
				end
			end

		end
	end

end)

UserInputService.InputEnded:Connect(function(input, gameProcessed)
	if input.KeyCode == Enum.KeyCode.E then
		Einput = false
		wait(0.1)
		print("stop")
	end
	if input.KeyCode == Enum.KeyCode.Q then
		Qinput = false
		wait(0.1)
		print("stop")
	end
end)

image
Any help would be appreciated

2

A non-local script … the local script may be the issue.

Good Luck! 
local UserInputService = game:GetService("UserInputService")
local Players = game:GetService("Players")

local seat = nil
local Einput = false
local Qinput = false

UserInputService.InputBegan:Connect(function(input, gameProcessed)
    if seat then
        if input.UserInputType == Enum.UserInputType.Keyboard then
            if input.KeyCode == Enum.KeyCode.E then
                Einput = true
                while Einput do
                    wait(0.1)
                    if seat.MainPart.BodyPosition.Position.Y <= -200 then
                        seat.MainPart.BodyPosition.Position = Vector3.new(0, -200, 0)
                        if seat.MainPart.BodyPosition.Position.Y < -204 then
                            warn("Position of airship is abnormally low!")
                        end
                    else
                        seat.MainPart.BodyPosition.Position = seat.MainPart.BodyPosition.Position - Vector3.new(0, 1, 0)
                    end
                end
            elseif input.KeyCode == Enum.KeyCode.Q then
                Qinput = true
                while Qinput do
                    wait(0.1)
                    if seat.MainPart.BodyPosition.Position.Y >= 400 then
                        seat.MainPart.BodyPosition.Position = Vector3.new(0, 400, 0)
                        if seat.MainPart.BodyPosition.Position.Y > 404 then
                            warn("Position of airship is abnormally high!")
                        end
                    else
                        seat.MainPart.BodyPosition.Position = seat.MainPart.BodyPosition.Position + Vector3.new(0, 1, 0)
                    end
                end
            end
        end
    end
end)

UserInputService.InputEnded:Connect(function(input, gameProcessed)
    if input.KeyCode == Enum.KeyCode.E then
        Einput = false
        wait(0.1)
        print("stop")
    elseif input.KeyCode == Enum.KeyCode.Q then
        Qinput = false
        wait(0.1)
        print("stop")
    end
end)

-- You can replicate the seat information to all clients here
Players.PlayerAdded:Connect(function(player)
    player.CharacterAdded:Connect(function(character)
        local humanoid = character:WaitForChild("Humanoid")
        seat = humanoid.SeatPart
    end)
end)