Back Button Sometimes Not Responding

Mar 17, 2016

I have a Redmi 3 Pro with the Stable 7.3.1 rom and experience a problem with my capacitive buttons.
Sometimes the back (and I think the other 2 too, but I don't need them that often to be sure) suddenly stops working for about 5-15 seconds. Is this a common problem (hardware or software) or not because a friend of mine has the same problem using a Redmi 3 (non-Pro) with the 7.1.3 Miflash version?

Has anybody experienced the same or has a solution to this bug?