Here is an example setup of several hardware synths where Blofeld is the only one NOT doing sync proper:
Korg microKEY -> MIDI ROUTER (Sipario) -> Kenton MIDI Thru 25 -> Roland TR 08, Nord Lead 4R, Nord Lead A1R, MicroMonsta, Access Virus, Blofeld.
All sync proper and also reset the sync when receiving a MIDI Clock start/stop, except for Blofeld which react like nothing happend and happely keep running to whatever MIDI Clock it first recieved.
Sipario is a MIDI ROUTER which provides MIDI Clock + MIDI Clock start/stop
Here is how each of the synths react to MIDI Clock start/stop:
Roland TR 08 = Stop (stops the Rhythmebox) Start ( starts the Rhythmebox)
Nord Lead 4R = Stop (nothing happens) Start (the arpeggio syncs to the start button push)
Nord Lead A1R = Stop (nothing happens) Start (the arpeggio syncs to the start button push)
Micromonsta = Stop (arpeggio stops playing) Start (arpeggio starts playing and in sync)
Access Virus = Stop (nothing happens) Start (the arpeggio syncs to the start button push)
Blofeld = Stop (nothing happens) Start (nothing happens)