Trying to understand Object.IsValid

Help
1

Why does the following work? I am trying to get my head around Object.IsValid.

Here is what is working...

function OnBeginOverlap(theTrigger, player)
-- The object's type must be checked because CoreObjects also overlap triggers, but we
if player and player:IsA("Player") then

       if Object.IsValid(spawnedHealth) then
           spawnedHealth:Destroy()
           propPickupItem:Play()
           script.parent:SetWorldPosition(triggerInitialLocation)
       else
           onRoundStart()
       end
    
   end
end

Whereas when I had the following code it would throw this error "Attempted to access an object that has been destroyed. Consider using Object.IsValid(myObject) to check for this condition."...

        function OnBeginOverlap(theTrigger, player)
        -- The object's type must be checked because CoreObjects also overlap triggers, but we
            if player and player:IsA("Player") then

            spawnedHealth:Destroy()
            propPickupItem:Play()
            script.parent:SetWorldPosition(triggerInitialLocation)
            onRoundStart()
    
    end
end

Can someone walk me through what is happening. Feels like a timing thing maybe. The destroy is happening so fast that it is running the onRoundStart code which contains the spawnedHealth variable which was destroyed already?

2

There is a slight possibility that spawnedHealth was already destroyed when the trigger was overlapped; therefore, we are checking of the "Object IsValid," meaning it is in the world and hasn't been destroyed.