Cryssyl

Just recently I’ve started to notice that the child lock on my 2018 GMC Sierra is always on, even though I never put it on and the light on the button is off. I have to press the button twice, once to turn it on and again to turn it off for the back doors to be able to open. I have 2 kids but they are 11 and 14. I haven’t ever had to use it and definitely don’t need it now lol. Anyone got some tips or tricks? Don’t really want to have to bring it in