Why does Unify crash on this patch?

I have a Unify patch that crashes Unify (Standalone or in DAW) consistently (screenshots).  In GuruSampler I'm using a sfz file that has .wav files assigned to various keys, except some keys are not assigned.  So if I play an assigned key like D1, the .wav plays ok.  If I then play C#1 or any other key without a .wav file assigned, it crashes consistently.  This does not occur if in Gurusampler I have Polyphonic selected.  But with Mono/Retrig and Mono/Legato it crashes.  I don't think this was happening prior to installing the beta release.