Wasp: Not playing higher notes.

[horseradish]

I'm playing on a Keystep Pro with midi directly into the Wasp. When the Keystep Pro is at default setting (no octave up or down), the Wasp won't play any of the notes on the high octave keys past C3 (Keystep Pros having four C keys, 3 octaves, 37 keys total).

I've checked to make sure it's running the latest updates. Is a known issue? Is this a bug particular to my unit? Does the Wasp only play lower notes?