I have this issue as well with the optical zoom. I have tried clearing the cache and going into safe mode to no avail. As a matter of fact it's gone from an occasional nuisance to an all the time thing. The phone is only a few months old and the camera is crippled.
@SamsungQue So what now? How do we move forward with the problem?
I went to all four ubreakifix outlets and 2 Bestbuy shops in Tucson and none of them is able to provide an in-warranty repair and I cannot ship my phone back to Samsung Repair Center in Texas to have the phone fix, because this is the only phone I have.
Any constructive proposal / solution aiding to my situation is greatly appreciation.