I found that this bug happens when the phone is overloaded. This bug not appears before i used backupmenu.
Here's an explanation
Touching incorrectly recognized at an average load of the processor.
For example when you turn on the phone or when an incoming call.
It seems that the phone recognizes just two touches: one at the point (0, 0), and the second in the place where the press.
Can you give some advice? Should I go to the service center?