Physical camera button causes phone to reboot

Re: Physical camera burton

I haven't had that problem, yet. However, if I take a string of pictures, say 8 to 15 in a row, I have experienced a few complete freezes with the camera app. The only thing that fixes the issue is a soft reset. The phone gets fairly warm too.
 
I have that issue here and there. Firstly, the camera button doesn't launch camera when display is off. Have to wake phone first.

Secondly, when I launch camera, first snap usually freezes for 3 seconds and then started working fine.

Thirdly, photo app takes forever to finish adding finishing touches.
 
Also, camera and photo app VERY laggy. Trying to take photos of my son playing. Missing so many good photo opps. Wouldn't happen with my iPhone.

Starting to get annoyed with this phone. The camera was the #1 reason I got this phone.
 
I guess what will help first is if I save the pictures to the actual phone and then once in awhile move the files to the SD card. Currently, I'm having the picture save directly to the SD card.