Help Phone sometimes vibrates when pressing power button

[Schwuar]

Hey all, my Slim Armour finally arrived and have put it on, so far i am liking it so will see how it goes

However... sometimes when i pick it up and press the power button the phone vibrates, i cant remember if it was doing this before i put the case on as well

the case has gone on pretty well, was a pain to get on (split it into 2 parts) and the plastic bit is slightly slanted, not even 1mm though, tired to move it but it wont, you cant notice it unless you go looking for it

all the buttons work fine and cutouts are all lined up perfectly

i thought it was only when i had a text message on screen but it did it when there wasnt one, confused :S

 

[Schwuar]

its just done it again however this time i locked the screen after i received a message and a few secs later it vibrated

 

[jwither]

its just done it again however this time i locked the screen after i received a message and a few secs later it vibrated

There may be other ways to do it, but I've turned on power saving mode, then in that menu, turned off haptic feedback.

 

[Schwuar]

Haptic feedback is off, it seems to be when i have a message and i pick my phone up

 

[jwither]

Haptic feedback is off, it seems to be when i have a message and i pick my phone up

Settings, motions and gestures, motion, smart alert.