To follow this up I can confirm that this is a problem with the firmware:
Firmware 1.0.4.0:
Sequencer Retrig = None (BROKEN)
https://www.youtube.com/watch?v=0Ocpp0c9hwMFirmware 1.0.3.2 (older)
Sequencer Retrig = None now (FIXED)
https://www.youtube.com/watch?v=EBdxhA2iWzMIn both videos I show before and after sending a midi clock. I am playing keyboard notes to see whether the sequence is interrupted. Unfortunately when midi clock is sent with the latest firmware, sequences get interrupted, causing it to be glitchy and horrible. I am only playing a 3 note sequence here but imagine if it were a longer sequence.... Makes the unit unusable.
I noticed this problem immediately when the current firmware was updated. Had I bought it this way I would have returned it to the shop within hours. So they will certainly lose customers because of this (pretty fundamental) problem.