shulkerbox is pushing me on top of another block

To reproduce:

1. place a shulkerbox in a sideways orientation
2. place block on the second block behind the shulkerbox's head
3. go standing in between the shulkerbox and the block.
4. open the shulkerbox

       you get pushed on top of the block, and don't return to the block when the shulkerbox is closed again