Problem With Medic AI Getting Stuck in Loop

[MegabyteOfficial (Hailey)]

I am trying to make a medic NPC that will heal the nearest friendly, and if there is none damaged, instead follow a radius around the nearest player.
The code works fine, until after it heals a target. After which, it will start repeating the closestFriendlyHrp check without actually finding one, even though the function is indeed returning nil which should activate the elseif not closestFriendlyHrp statement which would remove it from the loop, yet it doesn’t.

The code:

while wait(4) and hum.Health > 0 do
	warn("beginning")
	local closestFriendlyHrp = findClosestDamagedPolicesHrp(hrp, 200)
	print("friendly hrp check")
	if closestFriendlyHrp then
		print("friendly hrp found")
		while wait(1) and closestFriendlyHrp ~= nil and closestFriendlyHrp.Parent and closestFriendlyHrp.Parent.Humanoid.Health > 1 and (hrp.Position - closestFriendlyHrp.Position).Magnitude < 200 do
			print("chrpcheck")
			hum:MoveTo(closestFriendlyHrp.Position, closestFriendlyHrp)
			if (hrp.Position - closestFriendlyHrp.Position).Magnitude < 5 and CanHeal and --[[math.random(0, 2)  ~= 0 and]] closestFriendlyHrp.Parent.Humanoid.Health ~= closestFriendlyHrp.Parent.Humanoid.MaxHealth then
				print("chrptarg")
				print("medic is healing target: " .. closestFriendlyHrp.Parent.Name)
				CanHeal = false
				closestFriendlyHrp.Parent.Humanoid.Health += closestFriendlyHrp.Parent.Humanoid.Health / 3
				hum:MoveTo(hrp.Position, hrp)
				wait(4)
				CanHeal = true
			end
		end
	elseif not closestFriendlyHrp then
		print("not")
		local closestHrp = findClosestPlayersHrp(hrp, 400)
		print("plr check")
		if closestHrp then
			print("plr")
			while closestHrp.Parent and closestHrp.Parent.Humanoid.Health > 1 and (hrp.Position - closestHrp.Position).Magnitude > 42 do
				hum:MoveTo(closestHrp.Position, closestHrp)
				wait(1)
			end
			hum:MoveTo(hrp.Position, hrp)
		end
	end
end

Any help would be much appreciated!

[4SHN (sniffrainsniffcatyes)]

@MegabyteOfficial

findClosestDamagedPolicesHrp

how does the code for this function look?

[MegabyteOfficial (Hailey)]

local function findClosestDamagedPolicesHrp(myHrp, CheckDist)
	local closestFriendlyHrp = nil
	for _, PChar in pairs(PoliceFolder:GetChildren()) do
		local plyHrp = PChar:WaitForChild("HumanoidRootPart")
		local plyHum = PChar:WaitForChild("Humanoid")
		local TempDist = (myHrp.Position - plyHrp.Position).Magnitude
		if TempDist < CheckDist and plyHum.Health < plyHum.MaxHealth and PChar ~= char then
			closestFriendlyHrp = plyHrp
			CheckDist = TempDist
		end
	end
	return closestFriendlyHrp
end

[4SHN (sniffrainsniffcatyes)]

that looks good too me
I think the issue is here closestFriendlyHrp.Parent.Humanoid.Health > 1
shouldn’t this be (current health < max health)?

[MegabyteOfficial (Hailey)]

That probably is a good change, but I figured it out myself.
I added a check to make sure that a found character still had a valid HumanoidRootPart and Humanoid before using it.

local plyHrp = PChar:WaitForChild("HumanoidRootPart", 4)
local plyHum = PChar:WaitForChild("Humanoid", 4)
if plyHrp and plyHum then
	--contents
end