iPhone 7 taptic engine bug

I have discovered a bug regarding the taptic engine on iPhone 7. I have tested it on two new iPhones and it's the same issue on both. Whenever I use the lightning as output for streaming HDMI (via adapter), the phone comes alive. It's vibrating and buzzing all over the back of the phone and wherever I touch the case the vibrations intensify. Really annoying issue which means I can't use the phone for streaming via HDMI cable. I have tried to see if I could recreate the issue with the earpods or the charger but no problem here... I also tried turning off haptic feedback in settings but didn't help at all...

Please fix Apple...