Do you have power saving mode enabled? I noticed that when it's in powersaving mode it turns off haptic feedback.
I've also been having problems with the haptic feedback on my phone. I've done a factory reset already and the problem persists. It may seem petty, but I really enjoy the feedback and am a little disappointed that a brand new phone is already experiencing a glitch like this. AT&T refused to swap the phone with a new one due to it not being a hardware issue. Hopefully an update will be released to correct this.
Do you have power saving mode enabled? I noticed that when it's in powersaving mode it turns off haptic feedback.
