It does not happen any longer after the software update.
Even post firmware update, or wasn't it out yet at the time?The noise gate thing was a problem for me at low volumes.
IIRC, the update doesn't defeat the 20 minute sleep timeout by default. It gives you the option to disable it.I'm not sure my update worked correctly, because they still turn off "quickly" for me. But I don't care at all about that.