Android : CardView Doesn't Appear On Nexus5

I have been using android.support.v7.widget.CardView in my application and something funny is happening.

I don't see the CardView's in the IDE preview but they show up on all the various devices that my app is running on, such as:

• Samsung (GS III and IV)


• Moto G


• OnePlus 1

But when running on Nexus 5 (which is running Android 5.0) the CardViews don't show as if they aren't even there, but what's inside them is shown.

Does anybody know why that is? I haven't been able to find the reason looking online yet.