LG enV Touch VX-11000

Sometimes when I have my phone charging or just there the backlight (from the touchscreen side) will appear and it will be completely white, not even displaying my background picture. This happened with a previous phone and I had contacted them about this issue and they sent me a new phone. This phone has done that at least once or twice. One time as my fiancee was texting from my phone (from the QWERTY side) the screen flashed black and when the back-light turned on again the white parts to the screen were black and the letters that were suppose to be black were white. It was odd. I turned off my phone and removed the battery for a minute or so and turned it back on and it was fine. Has anyone had this problem?