Smart Lock Pin Pad Light Not Working

I recently installed the Smart Lock and the issue I'm having is the backlight for the keys on the Pin Pad.  The backlight will very rarely light if I press one of the keys and usually it does not light.  Is anyone having similar issue?  If the Pin Pad backlight does work could you please let me know if you need to press a key first or does it have a proximity sensor so when you put your hand near the Pin Pad does it turn on the backlight.  The Pin Pad keys are impossible to see when it is dark and Simplisafe advertises the lighted Pin Pad as a feature on their website. Thanks