RocketPropulsion takes a moment to activate after calling :Fire()

Help and Feedback Scripting Support
#1

Title is self explanatory. The missile object is frozen in space for a split second and then starts seeking its target. How do I get rid of this split second wait time and the activation of the missile?
Code:

local newMissile = missileObject:Clone()
newMissile.Parent = workspace.FX
newMissile.CFrame = firePoint.CFrame

local prop = Instance.new("RocketPropulsion", newMissile)
prop.Target = target.Value
prop.MaxSpeed = SPEED
prop.MaxThrust = config.MaxThrust
prop.TurnP = config.TurnP
prop.TurnD = config.TurnD
prop.ThrustP = config.ThrustP
prop.ThrustD = config.ThrustD
prop.CartoonFactor = 0
prop.TargetRadius = 3

prop:Fire()
newMissile.Transparency = 0

prop.ReachedTarget:Connect(function()
	print("Boom!")
	newMissile:Destroy()
end)
#2

This can be a engine bug, there is a well known engine bug that hasn’t been fixed called server-sided script delays, this goes for physics, tweens and velocity