[MC-96881] Player-ridden entities disappear on relog

Player ridden entities disappear upon relog, but only when the world is open to LAN upon getting on the entity and logging out.

1. Create a new singleplayer creative world
2. Open world to LAN
3. summon a minecart
4. get in the minecart
5. log out
6. log back into the world

the minecart will have completely disappeared.

Related issues

SunCat 2016-02-11T19:08:20Z

Can't confirm for 16w06a

migrated 2016-02-11T19:17:49Z

Only in the latest snapshot

migrated 2016-02-14T02:55:35Z

I figured out what the bug is. It only happens if the singleplayer world is open to LAN upon getting into the minecart and logging out.

SunCat 2016-02-14T08:16:55Z

Confirmed!

migrated 2016-02-18T03:48:41Z

Also happens with boats. Any entity the player is riding, really.

Lukeonia1 2016-02-21T15:28:43Z

Confirmed for 1.8.9 as well. Also works on boats, pigs, and horses. I discovered the latter the hard way, lost my favorite horse!

migrated 2016-03-13T16:30:18Z

What's with the environment change? Does this happen in multiplayer also?

migrated 2016-03-13T17:16:09Z

@unknown it's littirally mentioned in the description

migrated 2016-10-27T21:13:27Z

seems to be fixed in 16w43a. However, it also seems to be a duplicate of MC-47508