This is all stock, no flashing/rooting done yet.
I would like to know if this is a common problem before I exchange it for another M8 and encounter the issue again.
Just received a brand new HTC One M8 about a week ago and notice the touch screen is a bit spotty at times. For instance, when entering my pin to unlock the phone, some areas just won't respond to my touches until I either turn off/on the phone or rotate the phone from landscape to portrait again. Or when opening chrome and going back to the home screen, the same thing occurs and have to shut-off and on the phone again.