As an experiment tried plugging in a Herelink to another flight controller, SBUS and Mavlink. Standard Mavlink messages are working, however the SBUS is being very odd.
SBUS channels 3/7/8/9/10/11/12 are being recognised, but the others are not.
If a Futaba Rx is plugged in on FC boot up, all channels are recognised from the Futaba, if its then removed and the Herelink SBUS hot swapped, all channels work.
I realise there is no support for non-cube installs, but there appears to be something a little non-standard with the herelinks SBUS output. Any ideas on what it could be?