I've got a Sony Xperia XZ3, and recently I've noticed the display colour randomly keeps  changing itself and going super bright and strong, luminous in a way.

With a bit of investigating I found the setting that keeps changing itself is 'Settings>Display>Colour gamut and contrast'. Even when it changes itself the setting toggle (or whatever it's called!) still shows as what as I set it to.

I can't figure out any pattern as to when and why it happens, so the best I can settle with for now is I've put a display settings shortcut on my home screen for quick access for when I need to change it back, but it's happening all the time now and I can't imagine my patience will last!

Is there anything I can do to permanently stop this 'colour gamut and contrast' setting from constantly changing itself before I throw my phone out of the window?!