Camera Focus Problems with Note 4

This has been an issue since nearly day one. Out of the box; it took extraordinary photos with no problem. I previously had Cinema FV-5 on my Note 3 and it worked flawlessly. I installed it on my AT&T Note 4 and it worked flawlessly - for about a month. Sometimes; I could use the stock camera app and it took decent pictures. Then, both apps act as though there's no such thing as auto-focus. Sometimes; no focus at all. Eventually, after switching between apps, rebooting, or call my voodoo priestess, it will work fine. Sometimes yes; sometimes, no. Ditto issue with the AT&T Code scanner.

Anyone had similar issues? Advice? It's still under warranty, but I hate to have to do a rebuild if there's a quick fix.

Thanks!

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