When dispensing a minecart in a downwards direction it will float 3 pixels above the ground (minecart texture pixels). This will reset itself upon reloading the world.
Pic 1: Looking straight forward from inside floating minecart.
Pic 2: Looking straight forward from inside normal minecart.
Pic 3: How to re-create
Pic 4: The one furthest away is the floating one.
Is this still a concern in the current Minecraft version? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases. If this has been done, we can reopen the issue.
Keep in mind that the "Resolved"-Status on this ticket just means "Answered", and that we are waiting for further information on whether this issue still exists or not. We will reopen it as soon as the requested information has been delivered.