If a player logs in next to an open shulker box, the box displays closed. If the box opens to the top, and the player jumps on the top, they'll get stuck and be unable to move, or just move very slowly.

To reproduce:

• On a lan world, or server, have one player open a shulker box. Keep the box open.
• Have a second account log in next to the first one, or use a nether portal to arrive next to the box
• The box will display as closed.
• Have  the second player jump on the box. This will not work from the ground, as the hitbox is 1.5 blocks even when the client doesn't display the box open. But jumping from a pillar next to the box works.
• Once on the box, the second player seems to float above the box, and either can't move at all, or very slowly.
• I reported this for version 1.17

Observed Behavior:

Open shulker boxes are displayed as closed for other players when they enter the world.

Expected Behavior:

Open shulker boxes would not be displayed as closed for other players when they enter the world. Instead, open shulker boxes should always be displayed as open for other players when they enter the world.