Sticky SeatPart property when setting .Sit swiftly after sitting

[NWSpacek]

When using this code, the Humanoid’s SeatPart property gets stuck as the Seat the humanoid was sitting in:

local h = script.Parent:WaitForChild("Humanoid")

local function updateMovement()
	if h.SeatPart then
		h.Sit = false
		print("I am sitting in a seat",h.SeatPart:GetFullName())
	end
end

game:GetService("RunService"):BindToRenderStep("TestControlStep", Enum.RenderPriority.Input.Value, updateMovement)

When the SeatPart property ‘sticks,’ players are unable to jump or sit in any seats until they reset.

Setting the .Sit property to false causes no issues a short time after sitting.

This bug causes a critical error in the code linked below:

Divorce leaving a seat and jumping, but leave keybind the same

So, I went the abstracted boolean route and got this far. This is a replacement for the MasterControl module which should fully enable people to have seats and no jumping. It works well except for one critical bug: if you sit in a seat when isJumping is true, the SeatPart will not update accordingly and you will be unable to sit or jump until you reset. Further modifications include public API to enable the dismount behavior and having the dismount behavior disabled by default, with the idea t…

This bug was discovered in Play Solo mode on production.