With the 16w40a snapshot, when the player is in a minecart on top of a shulker box and they open it up, the player moves up slowly like normal, but towards the end, bounces a bit. Also bounces at the beginning of closing it. I'm guessing this is a bug involving hit-boxes. This is a very minor bug, so it doesn't matter that much if it gets fixed before 1.11 release.
With the 16w40a snapshot, when the player is in a minecart on top of a shulker box and they open it up, the player moves up slowly like normal, but towards the end, bounces a bit. Also bounces at the beginning of closing it. I'm guessing this is a bug involving hit-boxes. This is a very minor bug, so it doesn't matter that much if it gets fixed before 1.11 release.