If statements not running through and While loop only listening to one condition. Can any one help?

So I already asked about an older version of this script which I've added a lot more too

This is split up into 2 scripts and uses a Gui and remote events

StaminaClient - consists of the inputs used (located in; StarterPlayer.StarterCharacterScripts)

local userInputService = game:GetService("UserInputService")
local replicatedStorage = game:GetService("ReplicatedStorage")
local players = game:GetService("Players")

replicatedStorage.RemoteEvents.Run:FireServer("Run ended")


-- Sprint Key Pressed
userInputService.InputBegan:Connect(function(input)
	if input.KeyCode ==Enum.KeyCode.LeftShift then
		replicatedStorage.RemoteEvents.Sprint:FireServer("Sprint Began")	

-- Sprint Key Relased
	elseif input.KeyCode ==Enum.KeyCode.LeftShift then
		replicatedStorage.RemoteEvents.Sprint:FireServer("Sprint Ended")
	
-- Jump Key Pressed
	elseif input.KeyCode ==Enum.KeyCode.Space then
		replicatedStorage.RemoteEvents.Sprint:FireServer("Jump")
	
--Caps lock Pressed
	elseif input.KeyCode ==Enum.KeyCode.CapsLock then
		replicatedStorage.RemoteEvents.Sprint:FireServer("Run Began")

--Caps Lock Relased
	elseif input.KeyCode ==Enum.KeyCode.CapsLock then
		replicatedStorage.RemoteEvents.Sprint:FireServer("Run Ended")
	end
end)	

replicatedStorage.RemoteEvents.StaminaUpdate.OnClientEvent:Connect(function(stamina, maxStamina)
	players.LocalPlayer.PlayerGui.Hud.StaminaBar.Stamina.Size = UDim2.new((stamina / maxStamina) * 0.98, 0, 0, 10)
end)

I then have 3 remote events (located in; ReplicatedStorage.RemoteEvents)

Run - controls the caps lock input Sprint - controls the shift input StaminaUpdate - to do with visual side

I then have my main Run/Stamina script in ServerScriptStorage tis called Stamina Server

local replicatedStorage = game:GetService("ReplicatedStorage")
local players = game:GetService("Players")
local runService = game:GetService("RunService")

local maxStamina = 500
local staminaRegen = 2
local minStamina = 0

local sprintModifier = 1.8
local runModifier = 1.2
local sprintStaminaCost = 4

local sprintingPlayers = { }
local runningPlayers = { }

players.PlayerAdded:Connect (function(player)
	local stamina = Instance.new("IntValue", player)
	stamina.Value = maxStamina
	stamina.Name = "Stamina"
	
	stamina.Changed:Connect(function(property)
		replicatedStorage.RemoteEvents.StaminaUpdate:FireClient(player, stamina.Value, maxStamina)
	end)
end)


-- Adjust Stamina for each player every frame
runService.Heartbeat:Connect(function()
	for index, player in pairs (players:GetChildren() ) do
		local stamina = player.Stamina
		local name = player.Name
		
--Sprint
		if sprintingPlayers[name] then
			if stamina.Value > maxStamina or
				stamina.Value <=minStamina then
				stamina.Value = 0
				
			elseif stamina.Value < maxStamina then
				stamina.Value = stamina.Value - staminaRegen
				
		else
				if stamina.Value >= sprintStaminaCost then
					stamina.Value = stamina.Value - sprintStaminaCost
				else
					player.Character.Humanoid.WalkSpeed = sprintingPlayers[name]
					sprintingPlayers[name] = nil
				end	
			end
		end
		
--Run
		if runningPlayers[name] then
			if stamina.Value > maxStamina or
				stamina.Value <= minStamina then
				stamina.Value = stamina.Value
				
			elseif stamina.Value < maxStamina then
				stamina.Value = stamina.Value
				
		else
				if  stamina.Value >= sprintStaminaCost then
					stamina.Value = stamina.Value
				else
					player.Character.Humanoid.WalkSpeed = runningPlayers[name]
					runningPlayers[name] = nil
				end	
			end
		end
	end
end)

-- Key pressed/released using the remote event
replicatedStorage.RemoteEvents.Sprint.OnServerEvent:Connect (function(player, state)
	local humanoid = player.Character.Humanoid
	local stamina = player.Stamina
	local name = player.Name
	
	local run = false
	local sprint = false
		
--Jump Stamina deduction
	if state == "Jump" then
		stamina.Value = stamina.Value - 50
	end
	
--Sprint Stamina deduction
		if state == "Sprint Began" and humanoid:GetState ()  ==  Enum.HumanoidStateType.RunningNoPhysics and humanoid.MoveDirection.Magnitude > 0 and stamina.Value > minStamina then
			sprintingPlayers [player.Name] = humanoid.WalkSpeed
			humanoid.WalkSpeed = humanoid.WalkSpeed * sprintModifier
			sprint = true
			print("Sprint = ",sprint) --prints are just for testing
		
		elseif state == "Sprint Ended" and sprintingPlayers[player.Name] or stamina.Value < minStamina then
			humanoid.WalkSpeed = sprintingPlayers[player.Name]		
			sprintingPlayers[player.Name] = nil
			sprint = false
			print("Sprint = ",sprint) --prints are just for testing
		end
	
	--Run detection
	if state == "Run Began" and humanoid:GetState ()  ==  Enum.HumanoidStateType.RunningNoPhysics and humanoid.MoveDirection.Magnitude > 0 then
		runningPlayers [player.Name] = humanoid.WalkSpeed
		humanoid.WalkSpeed = humanoid.WalkSpeed * runModifier
		run = true
		print("Run =",run) --prints are just for testing

	elseif state == "Run Ended"  and runningPlayers[player.Name] then
		humanoid.WalkSpeed = runningPlayers [player.Name]
		runningPlayers[player.Name] = nil
		run = false
		print("Run =",run) --prints are just for testing
	end
-- Stamina add
while stamina.Value < maxStamina or run == false or sprint == false do
	stamina.Value = stamina.Value + staminaRegen	
	print(stamina.Value) --prints are just for testing
	wait(1)
end
	
end)

Issue 1. the first issue is with the If statements in the Stamina Server, I've tried meany things to get them to work and to figure out what the issue is (although I'm only learning lua)

The main problem I have noticed is when you run out of Stamina it causes a different effect on the sprint depending on if you where sprinting when you ran out

so say I was sprinting and i ran out of stamina while sprinting I could carry on sprinting but if I stop then I cant sprint until Stamina is regend

Issue 2. so my second issue is with the while loop at the very end, when the player spawns both sprint and run are = to false and stamina.Value is = maxStamina meaning you do not regain stamina but as soon as your stamina.Value decreases It causes the stamina.Value to increase till its = to maxStamina even if you do run or sprint

an example of this is if i start sprinting (meaning stamina.Value stats to drop to < maxStamina) it will run the while loop which is an issue

Thanks for any help you can give me, I've been so frustrated at this the past few days XD I used a youtube video to base this off but I've added my own modifications I also do know server side is an annoying way of doing a sprint script but I have my reasons ;)