HTC Thunderbolt Killing the home app?

Something that has been extremely aggravating me recently is that my HTC Thunderbolt seems to be automatically killing the home app whenever it needs space in it's ram. I notice that this happens when I do something processor intensive like downloading a new app. When I press the home button, it will just display a white screen that says "HTC" on it, and then go to the home and open up a toast saying "loading" just like when the phone first boots up. At first, I thought it was some of my other apps that were causing it, such as "advanced task killer" and "juice defender ultimate", but I uninstalled Advanced Task Killer, and disabled Juice Defender, and it is still happening. **Is there a way to stop this?**