I’ve had a reply from Nathan Navarro of Source Audio:
Apparently the LED not always moving on is normal.
The locking up thing is a bug and one which he was able to replicate on their gear so he’s passed it to the engineers and hopefully there’ll be a bug fix. It basically happens if you cycle quickly through the “option” button.
@CameronJ, @GisserD, @Al Krow, @BNB71