I have used an m3 note and m2 note together as a fan of flyme and meizu.  I have been satisfied with the m2 note touch quality, however, I can hardly say m3 note is better than m2 note with regard to touch quality.
Frequently my m3 note has dead touch area as follows (red colored box area), and then  be revived some hours later.  In short, it has fixed dead touch areas.

Is this hardware problem or software matter?  Would you let me know how to cope with it?