Is this a new, or new to you, device?
When did this start happening?
Have you installed anything new recently?
When you restarted your phone did you Restart, or Power down and Start your device?
As mustang7757 began to suggest, have you tried it in Safe Mode?
Do you have a screen protector on this device? A case?
What strikes me about the little information we're working with is that it appeared to be working, at least somewhat normally, you thought, when you turned off accidental touch. What it reminds me of is one of two things. Like the screen is dirty or a bad screen protector install. Either might cause some latency and making the screen more sensitive could cut down on that and depending on where the issue is, say you have lifting protector in a corner, touches close to that might respond quickly but father away might see it as a dual touch creating some delay. The other thing that it brings to mind is something in the background running. You might think powering off the device and restarting it would close or end all of that but if you notice none of the apps disappear from your quick switch screen when you just restart the phone. This is another reason to try Safe Mode. If some nefarious app is causing this, in safe mode all of those background processes are blocked. Which brings up another thought, what about the outside screen? I don't know the Flip that well but the outside screen is touch also, correct? Does it also suffer from this latency?
Please answer the questions and try Safe Mode, let us know what you find.
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