Accessing Max/Min Property Errors

Hello

I have run into a really wired situation but I am trying to access the max & min channel properties in a script and I get a null value as a result

So I am using the following function to gain access to the channel group in a for loop and it returns a null value after the first iteration of the loop.  However when I use the debugger, the function below return the correct values.

Data.Root.ActiveChannelGroup.Channels(i).Properties.Item("Maximum").Value

or

Data.Root.ActiveChannelGroup.Channels(i).Maximum

I am using 2017 SP1

Anyone else come across this?