Is it just me or....

Well yes it would make sense it if turned off while you were on a call. You can allways turn it on using the lock button on top.
 
It always goes out right away no matter what... sometimes its a little annoying. I'm guessing its to save battery life.
 
Yeah it does go on a bit faster. Also, I've been having the volume rocker buttons on the side activate the screen sometimes even when locked?? Anyone else experience this?