Hi Adrien. Based on the log info, you're sending CC 43 on channel 16 all over the time, only the values sent differs.
According your manual, the CC43 corresponds to: VCF Pitch Follow (43) (0-127), that is a continuous controller with a full range, so it should be assigned to something like a slider.
My advice: try something simpler first like a button assigned to a controller with toggle values, just to be sure the connections are correctly stablished on both ways. Try also receiving some data.
Exempli gratia:
Start/Stop Arp [CC70] (MIDI min: 0, Arp Stopped) (MIDI max: 64, Arp Playing)