Hi Ray,
Thanks for the response, your explanation of the design was helpful, you have confirmed my understanding of the way it works.
I am using an adjustable bench supply for the moment set at around 8V. There is no wired ethernet module, just basic original circuit.
I agree that its not making any sense that there is a higher current draw with the BVE line left high and that shouldn’t influence the 5V line, I will investigate a bit more.
Thanks
Paul