The Triton has a sequencer on board that has it's own beat clock and appergiator.
That device is always sending out beat clock out of it's midi ports. When using the device with a multiport interface, you must turn the MIDI clock source to External instead of internal..
by hitting the GLOBAL button and going to (Page 1 which is the MIDI page)
and turn your Midi Clock to EXTERNAL instead of INTERNAL