In addition to MIDI Learn (using note learn) not working properly for changing multis AND patches, I am experiencing the following.
1) Arpeggiator - works fine as long as I don't use the hold pedal. As soon as I use the hold pedal, the arpeggiator keeps running - even with the hold pedal NOT depressed, and also without any of the keys pressed. I can only stop if by switching to another patch or multi. I never experiences this problem with the previous version of Omnisphere. I'm at a loss of how to fix this.
2) Many multis (haven't tested the patches yet) cut out because the number of voices is set too low - at least I presume that this is the problem, because raising the number of voices solves the problem. So I can fix this, but weird that I never encountered it with the previous version of Omnisphere.
I did some checking, and indeed the zone buttons on the Roland controller I'm using (RD-700GX) were the culprit. All three of my problems have been solved. So, now I can happily check out all of the new sounds, and start making music!