When a minecart is placed and then picked up it adds a tag (which is the item name) and the item name changes into entity.minecart.rideable.
Related issues
Comments

The main ticket for this is MC-95922. It has been fixed in 1.11.
When a minecart is placed and then picked up it adds a tag (which is the item name) and the item name changes into entity.minecart.rideable.
The main ticket for this is MC-95922. It has been fixed in 1.11.
migrated
(Unassigned)
Unconfirmed
Minecraft 16w07b
Retrieved
Hey... this issue still occurs in 1.10.2
http://i.imgur.com/pqgFqbT.png