Orange Pi R1 plus LTS Console and USB Network Adapter

I have been running an OrangePi with an RTL8152 or AX88179 USB dongle for months without any problems. I recently connected up the serial console for debugging an issue. If I have the USB port unplugged the console works a treat. If I plug either dongle in the console just dies.
Are they on the same USB Port?
Is this a known problem?
I cant check the schematic because is down.
It appears that the console only freezes when an Ethernet cable is plugged into the USB adapter