PO400 sequencer module: step reset working on every step?

Just got my PO400 back from repair, the filter module now works as expected, but the sequencer module still has a problem:
When you dial the step knobs to maximum it acts as sequencer reset (back to step 1). On my PO400 this works for every knob except the ones on position 4 and 7. Does anyone else have the same issue?