VehicleSeats seem to have an issue where they don’t always work when using VehicleSeat:Sit(humanoid). This does successfully “sit” the character, but the controls don’t seem to be capturing. For instance, the HUD doesn’t show up & trying to steer/throttle the vehicle does nothing.
I haven’t been able to properly reproduce this yet. It always happens in a game server – I haven’t experienced this in Studio yet. And it seems sporadic. I don’t know what triggers it. Sometimes it works, sometimes it doesn’t. There are no logs/errors to show.
Other developers have informed me that they have experienced this issue too. It doesn’t seem to be a new issue. I don’t know how long it’s been an issue.
I have tried to hack my way around this in various ways, such as adding a couple of seconds of delay between spawning the car and sitting the character. Nothing seems to work.
I have been experiencing this at my “truck test” place:
https://www.roblox.com/games/4583890260/Truck-Test
The relevant code on my end is the following. I’ve taken out stuff that doesn’t matter:
-- Server-side script. This is a snippet within the vehicle spawner.
-- Give ownership to the player:
truck.Parent = trucksFolder
truck.PrimaryPart:SetNetworkOwner(player)
-- Create a VehicleSeat:
local seat = Instance.new("VehicleSeat")
seat.CFrame = truck:GetPrimaryPartCFrame() * CFrame.new(0, -3, 0)
seat.Parent = truck.Body
-- Weld seat to truck:
local seatWeld = Instance.new("WeldConstraint")
seatWeld.Part0 = seat
seatWeld.Part1 = truck.PrimaryPart
seatWeld.Parent = seat
-- Sit the humanoid after an arbitrary 0.2 second delay:
wait(0.2)
seat:Sit(humanoid)
TL;DR - Sometimes VehicleSeats don’t properly capture user input (e.g. changing SteerFloat/ThrottleFloat properties), nor show the HUD, thus it seems like a VehicleSeat-related bug. This happens when using VehicleSeat:Sit(humanoid). Sometimes it works, sometimes it doesn’t.
