CustomNameVisible does not display default name for certain entities

The bug

When you set CustomNameVisible to 1b for certain entities without providing a CustomName, their default name is not displayed.

How to reproduce

1. Use the following command

   /summon Cow ~ ~ ~ {NoAI:1b,Health:0.1f,CustomNameVisible:1b}
   

   The cow has the name "Cow"

2. Use the following command

   /summon MinecartRideable ~ ~ ~ {CustomNameVisible:1b}
   

   The name is not displayed