LG VX-4500

I have a major issue with my vx-4500. When on a call and switching over to call waiting my screen lights up and never dims until I end my call. For obvious reasons this is a problem (decreased battery life and a hot phone). I called VZW technical support and the representative told me (after performing testing on a few models he had with him in the office) that this seems to be a design with several different models of LG phones. I'm not very happy with this situation since he believes this is not something that will be corrected with future software updates. Has anyone else experienced this problem and/or found a solution to this besides just not answering the call waiting?