Since the update, my phone makes the noise whether it is on vibrate or even in silent mode. Prior to the update, this was not the case. Even on vibrate, it would not make the noise. Really annoying that this would be affected by the update
On a separate note, for anyone looking for a solid wireless charger where you never have to worry about the connection failing, I highly recommend this QI charger from Panasonic.
Panasonic Qi wireless charger (QE-TM101)
Here is a quick clip on Youtube. You will see that the charging component from underneath the main bed of the charger automatically recognizes where the phone is and moves to where ever the connection is made.
Panasonic Qi wireless charger (QE-TM101) - YouTube
I bought it for about $45 ($55 with shipping) about a month ago. It is a little big I terms of size, and my phone battery seems to get a little hot, but from what I have read, this tends to be the case with a lot, if not all the wireless chargers.