Hi, i mean when phone is set on vibration or do not disturb, there is no vibrating feedback when using real buttons. try yourself on a UMI Super and you will understand.
I can confirm that I also have the same problem with the UMI Super whilst in do not disturb or vibrate mode the captive buttons do not work at all. I am in talks with Super Mod Bence about creating a new section on forum directly for bugs etc to save all users having to scoll through pages to get their answers to their problems they are having .
Stay tuned..