Camera [Q] Can't disable shutter sound after 4.3 upgrade

A strange and slightly annoying matter of fact, after I upgraded my C6802 to 4.3 I'm no longer able to disable the shutter sound in the default camera app. The menu/setting option is gone. Anyone else had the same problem?

My C6802 is the HK version, and I was able to disable it in 4.2.2.

I do live in Japan, and did upgrade while in Japan, but should that matter?
(I know that phones 'sold in Japan' aren't able to have their shutter sound disabled, but the Z Ultra isn't for sale in Japan, so in my opinion it shouldn't matter.)