Disable auto-screen-on feature in Moto G Play
This feature is called Moto Display and is very similar to AOSP's ambient display.
Assuming it is in the same place as the Moto G 2015 and Moto X Pure devices, open the Moto app, go to Feature Settings (the 3 stars in the upper right corner) and then select Display and turn the slider off.
If that doesn't work, try turning off &quot;Quick Capture&quot; in camera settings.