iPhone SE LCD Screen and Digitizer Replacement

I just replaced the screen and digitizer on my iPhone SE with an iFixit replacement kit. Everything went smoothly and the screen works. However, the touch seems a bit slow and lagging at times. Sometimes it seems I have to tap something a couple times for it to recognize it. I don’t have any ghost touches anymore, which is what used to happen. Now, it is just a little slow to the touch. Is this a known issue? Does this have to do with an aftermarket product? Could it be something with my install? Thank you.