Hermod+ midi sequence problems via USB Device connection

Hi
I am sending midi sequence data from Ableton (latest build) to Hermod+ via the USB Device port. I am sending this sequence data out to a modular voice via an XP32 Pitch and gate track. I am finding that the sequence data works for a few loops of the sequence, then it will glitch and somehow create multiples of the notes so that it sounds like its being played through a delay (there is no delay in my case). When i send same data via midi into Hermod+ than all works as it should, no issues.
Is this a fault with the USB Device connection? Any other thoughts on what might cause this?
Is there a Factory hard reset option for the Hermod+?
Any help appreciated.