It seems that voice allocation is messed up in a 4 voice polyphonic layout. See attached video: first, I play some 4 note chords - all good. Then I play single notes, and the notes are completely off.
I have firmware 1.03. After switching on, all I did was select a 4voices poly layout and then played. The keyboard was a Yamaha digital piano connected via USB. If I switch to a 1 voice mono layout, everything is fine. See video below for an illustration of the issue.
Hermod by Squarp - 4 Voice Poly Mode Not Working from Andreas Steiner Modular on Vimeo.