Any reason for stamina charge not working?

Instead of increasing the stamina by 10 every time, it increases by 10 the first time, then on the second it goes up by 30, then 70 and so on.

local Player = game.Players[script.Parent.Name]
repeat wait() until Player and Player:WaitForChild("Stamina") ~= nil
local MaxStamina = (100 + (1.5 * Player.Stats.Level.Value))

Player.Stamina.Changed:Connect(function()
while Player.Stamina.Value < MaxStamina do
		wait(0.5)
	Player.Stamina.Value = Player.Stamina.Value + (10)
	if Player.Stamina.Value > MaxStamina then
		wait(0.05)
		Player.Stamina.Value = MaxStamina
	end
end
end)

any better way of writing this? Or any suggestions on the problem?