This Christmas I gave a Wiko Lenny 3 to my son, it comes with Marshmallow. When trying to install a parental control I sadly discovered that there's a bug (I suppose) that is well documented for Lollipop/Samsung, that prevents accessibility services to be activated.

In other words, as soon as I activate the parental control in the settings/accessibility/services option, it always appears off, although it's on, and resets to off randomly and at every reboot. This makes totally unusable the parental control.

The questions are:

• is there a fix for this? (Any solution with battery savings was tested with no success)
• is there a way to understand, via logs or monitorings, what is preventing the services to be activated?
• would rooting some how change something?
• could I install a different Android version without this problem?