Hitbox bug when the projectile disappears, although I have already tried to spawn the hitbox separately and the projectile does not disappear

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Hello developers, my problem is a hitbox bug.Hitboxes in my game are desks that collide between each other causing damage. Here is the script I use normally:

projectile.Touched:Connect(function(hit)
		local humanoid, hitPlayer = getHumanoidAndPlayerFromPart(hit)
		if humanoid and hitPlayer ~= playerWhoShot and not hitHumanoids[humanoid] then
			-- Наносим урон, если это не стрелявший игрок
			if humanoid.Health > 0 then
				local dam = damage+(zaryad*3)+A
				if A <= 20 then 
					dam = damage+(zaryad*3)+(A)
				elseif A > 20 and A <= 50 then
					dam = damage+(zaryad*3)+(A*1.5)
				elseif A > 50 then
					dam = damage+(zaryad*3)+(A*1.75)
				end
				
				if hit.Parent.Humanoid:FindFirstChild("Shield") then
					if hit.Parent.Humanoid.Shield.Value <= 0 then 
						hit.Parent.Humanoid:TakeDamage(dam)
					else
						if hit.Parent.Humanoid.Shield.Value <= dam then
							hit.Parent.Humanoid:TakeDamage(dam-hit.Parent.Humanoid.Shield.Value)
							hit.Parent.Humanoid.Shield.Value = 0
						else
							hit.Parent.Humanoid.Shield.Value -= dam
						end

					end
				else
					hit.Parent.Humanoid:TakeDamage(dam)
				end
				hitHumanoids[humanoid] = true
				zaryad += 1 
				print(zaryad)
				delay(10,function()
					zaryad -= 1
				end)
				loadDamageGui(hit,dam)
				local blood = game.ServerStorage.Blood.Attachment:Clone()
				blood.Parent = humanoid.Parent.HumanoidRootPart
				blood.ParticleEmitter:Emit(1)
				game.Debris:AddItem(blood,1)
			end

		end
	end)

or

local function getPlayerFromPart(part)
	local humanoid = part:FindFirstChildWhichIsA("Humanoid") or part.Parent:FindFirstChildWhichIsA("Humanoid")
	if humanoid then
		return game.Players:GetPlayerFromCharacter(humanoid.Parent)
	end
	return nil
end
if hit.Parent:FindFirstChild("Humanoid") and hasDamaged then
				if hit.Parent.Humanoid:FindFirstChild("Shield") then
					if hit.Parent.Humanoid.Shield.Value <= 0 then 
						hit.Parent.Humanoid:TakeDamage(dam)
					else
						if hit.Parent.Humanoid.Shield.Value <= dam then
							hit.Parent.Humanoid:TakeDamage(dam-hit.Parent.Humanoid.Shield.Value)
							hit.Parent.Humanoid.Shield.Value = 0
						else
							hit.Parent.Humanoid.Shield.Value -= dam
						end
						
					end
				else
					hit.Parent.Humanoid:TakeDamage(dam)
				end

All hitboxes and projectiles have the tag perra
The error is that the first projectile is destroyed if another player applies a second type of attack with a different hitbox, as far as I was able to verify this is not related to CanTouch CanColide and similar settings, as spavn hitbox in the workspace separately solves the problem, but in the case of a hitbox appears on the script occurs some error that destroys the first projectile.
Please help me with this problem. I think it may be something to do with scripts or with roblox studio directly