The bug
Stacked minecarts have variable visual behavior based on the presence of an underneath rail.
Demonstration
[media]shows carts stacked with a rail underneath appear as just one cart.
[media]shows carts stacked without a rail underneath will actually appear to stack.
Is this still an issue in the latest snapshot 16w44a? If so please update the affected versions.
This is an automated comment on any open or reopened issue with out-of-date affected versions.