Fronius Binding DC Channels

I have openHAB 3.4.2 running on an rPi4.

I have a Fronius Primo 5.0-1 Inverter using both MPPT1 & MPPT2.

Using the binding most of the inverter related channels work.
Except for the DC related Channels (Voltage, Current, power). Only the First Channel of 3 will report a value, eg DC Voltage 2 or DC Voltage 3 will not work, DC 3 not working is expected. I expect the second channels to relate back to MPPT2.
I compared the values back to the data logger and it appears to only show the information related to MPPT 1.