MacBook Pro Retina display late 2013 trackpad issue?

Hello all,

So this is the third MacBook pro retina 8 GB RAM and 256 GB SSD laptop I am exchanging!

All three I brought home , and they work perfectly except for the trackpad .

I will explain as much as I can:

So let's say I left my MacBook for about 10 seconds, then I come back to swipe up or down using the trackpad, it lags or doesn't respond right away!!! Only when k first touch the trackpad to swipe, but after first touch it works fine until I leave it again and come back and same thing !

I can feel that the trackpad locks after a few seconds of leaving the MacBook running, or it goes on sleep, and first touch awakes it,

I have tried many things , such as SMC, system preferences , and reinstalling the OS , but didn't work!!

Please tell me of that is normal or if I just happen to get a defective laptop three times!

Because I honestly don't want to go back to the store again,!!

My OS is 10.9.3

Thanks