Trixy design decision. We can map S1-S4 buttons to CUIA functions. We have a default mapping of HID keys to CUIA functions. It feels wrong to map HID events to S1-S4 button events. It would be more logical to map the HID events that your remote buttons create (e.g. ‘b’) to the same CUIA events that you map the S1-S4 buttons to, i.e. ‘b’ is not S1, it is mapped to same CUIA as S1.