I was playing an adventure map on the latest snapshot, and during a 'boss' fight, signs and dropped items were floating around the screen, and would move with the 'boss' as well as with my camera.
I'm not sure how to reproduce precisely, but possibly:
Spawn a powerful mob (preferably with super speed).
Die.
Teleport somewhere nearby.
Entities should floating around.
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.