It seems that if I let Omnisphere decay with a delay effect recirculating the sound, roughly 30 seconds after the last note is played, Omnisphere cuts the sound off abruptly (as if a noise gate, but more like a CPU gate, in practice), killing the natural decay. If I play another note, magically the remaining decay and my new note appear.
It's a frustrating deal for those of us interested in long decay.
Can any Spectro people comment on this behavior? I sure would be happier if it didn't go like this.