Settings keep changing automatically

[Vader_0707]

 I have recently updated my Xperia XZ to android 7.1 and I have noticed that some of my settings keep changing like that 'vibrate on touch' feature keeps going off. Everytime I put it back on, it goes back off after a while. This also happens with my 'image enhancement', it keeps going off. 

I would really appreciate it if someone could tell me what is going on and if anyone else is experiencing the same thing. 

[Uliwooly]

@Vader_0707

could you check if it happens when you open an specific app, btw, do you have any antivirus or taskiller installed?