In December I had a freeze and the Helix did not properly boot again (just showing this animation and the firmware info).
Resetting to factory settings did not work too so I had to send it to a service center.
Today the Helix froze while I was adjusting the FX Loops send level, I had to do a complete reset before
the device booted again.
Such stability issues are a real problem for a device of that price-class. I hope the Line6 developers are working on this