Reset after firmware updates is sometimes caused by clashing of the remnants of old firmware with the new. The recommended method is to do a factory reset and clear the cache. It leaves the phone on the latest firmware, but all settings and apps have to be redone and re-downloaded. So I suggest backing up whatever you can if you intend to do this.
I had some reboots a few times after updating but it seems to have cleared up which I take it to mean that somehow the old cache have been rewritten or something like that. I never cleared the cache or factory reset since I already have 100+ apps which is such a hassle to redo everything.