When riding in a minecart, player renders several blocks behind the minecart, but still appears to be sitting on something.
Linked issues
duplicates 1
Comments
Duplicate of MC-1291.
This issue's title can be misunderstood. From what I can tell, he means that the player is still visible, but lags behind the minecart (if you read my first comment). It seems like a simple lag issue, but I think it's still an issue that should be fixed, probably by having the client detect when other players are in minecarts and by ignoring player coords and using (offsetting by the proper amt) the minecart's coords instead, or something of this effect, to make riding player's positions dependent on the minecart instead of being sent separately.
Probably a lag issue, but annoying nevertheless.