I'm going to guess that the LF sends a flood of controller messages when the pedal is changed, each one of which has to be processed by the 'factor. This probably takes time (display update, etc) and that causes the lag.I don't see an actual fault.
Because the PCM80 and the 'factor do different things on receipt of the message, the response time will be different. The solution would be to only respond to the latest CC and ignore earlier ones, but that is not a trivial mod, so not expected soon.
