Samsung Epic 4G :: Dial Pad Lag?

I just splurged on an Epic and I am loving the phone so far but I noticed a small glitch and was wondering if anyone else is experiencing this and if there is a solution. I noticed that the dialpad sometimes has a lag when entering numbers into the dial pad. To clarify:

Yesterday I was calling my cable service provider. I was prompted by the automated customer service sytem to enter in my phone number. At this point I had the phone to my ear and and in order to enter my phone number I then proceeded to remove the phone from my ear and started punching in the numbers. The phone screen awoke from sleep and as I started to punch in the numbers I noticed that the screen did not register my touch enteries right away. In fact I had to press the screen a couple of times before the screen press was registered and the correct selection was made. It only seems to occur under these circumstances: The phone screen is off due to the light sensor being covered while the phone is next to your ear. If you remove the phone from your ear and then proceed to enter numbers on the dialpad some lag does occur and the numbers do not show up immediately. In fact the screen will not even resgister the few one or two attempts at making a selection.