This is a combination of Arpegiators, Midi Clock, and Active Sensing. You can turn off two of these by doing the following:

Press the ARP button to turn arpegiators off.

Go to Global - Menu, highlight MIDI and press F8 to open. Change Midi Clock from INT to EXT.

The Active Sensing should not cause any problems, it is a MIDI blip that occurs only several times a second.