Plug in one of the AD inputs and see if you get serial WBO2 to display.
My issue is passthru showing incorrect data or no data with out one of the AD plugged in.
If someone wants to configure my options.txt to show AD volts and serial WBO2 in BBL
then you will see the difference between BBL and passthru.Options.txt
This is definitely a bug in build 82, 81 worked fine.
My apologies for suggesting the OP to update.