I have an Origin with OS 1.2.5 and one of the most annoying bugs is the sound cutting out and the only way to get it back is switch it off and on again.
Normally this happens when you have it playing from a midi source such as looping a short phrase from the sequencer and then auditioning patches and some times when tweeking the controls. Evething else is working, it doesn't lock up, you can save what you are working on, it just goes silient.
This and the data entry knob which is so erratic as to be unusable sometimes are the most pressing bugs that need fixing.