I don’t know why, the double tap to wake feature doesn’t work on my Meizu MX5. I have had this problem for a couple of months or so and today I finally decided to do a clean install, wiping everything and installing Flyme OS 5.1.3.0A, however, it still doesn’t work.

The ironic thing is that if I unlock the device using the power button, I can lock it again by double tapping the screen, therefore I am pretty sure it is not a hardware problem.

Has anyone got any ideas?