Phone presses back button by itself

[mito77]

I'm having this issue for a couple of days. The phone (Wiko U-Feel Lite) it's not damaged and it's in perfect condition, i bought it not even a month ago.
Sometimes, and it's getting more frequent, it presses the back button by itself and it's reeeaaally annoying because i might be reading something on facebook or stuff and it just goes back to the top of the timeline. What can i do?

 

[Tim1954]

Cache partition wipe would be my first move.

Do you have a screen protector on it? That may cause such things.

 

[mito77]

yes i have a screen protector. I'll try the cache partition wipe