HTC Desire :: Delay After Hitting Home Button

New to the forum and the reason I signed up is I can't seem to find anything online about the problem I'm having with my HTC Desire. I am running a custom Froyo ROM (DeFrost 5.1) with ClockworkMod 2.5.0.7. My issue is that sometimes when I'm in an application (as far as I can tell, any application..haven't been able to pick up on any patterns, other than I have to be in the app for more than about 15 seconds) and I hit the home button, there is about a 5+ second delay before the phone reacts. While I'm waiting, the current app is fully functional as if I hadn't done anything although after waiting it will do it's usual process to get back to the home screen (fluid animation and everything). Hitting the home button multiple times seems to make the process go faster, although there is still a delay (the sense of it happening faster could simply be that I'm doing something instead of just sitting there too and it's not a real decrease in the delay). I have Launcher Pro Plus installed with "Keep in memory" and "Use homescreen caches" options enabled to try and make the home screen react faster. Memory usage preset is set to "High" and Homescreen cache type is set to normal. The weird thing about this is before I installed the custom ROM, I was experiencing the same thing with Android 2.1 w/ Sense UI since I got the phone (got it end of August) and if I remember correctly happened both with and without Launcher Pro installed (didn't know about the memory settings in Launcher Pro at the time so they were at default then). Is anyone experiencing a similar issue and/or does anyone have any suggestions as to how to fix this? I really like Android and truly want to love it, but things like this just keep getting in the way. If it's an OS issue then Google really needs to work on this as it really is nuts when you want to switch apps to wait 5+ seconds before even getting started.