Default [Q] Silent Mode auto off problem

Hi Everyone

About 2 or 3 weeks ago I updated my N7000 to jelly bean, at first I regretted it,
but after a factory reset and an OTA update, all is well now, sort of.

The problem I'm having is that the phone would randomly disable silent mode.
Now I've done a few searches and only came up with some people having the
same problem, but only auto disables at 00:00. Mine is completely random.

I've had the phone for roughly 2 years now, and this only started happening
after the JB update before the factory reset.

If anyone could help me solve this problem, it would be greatly appreciated.