Items Above the Shulker Box Bounce Repeatedly after the Shulker Box Opened

Summary

Items above the Shulker Box bounce repeatedly after the Shulker Box opened.

Steps to Reproduce

1. Put a Shulker Box.
2. Throw some items above the Shulker Box.
3. Open the Shulker Box.

Observed Results:

Items above Shulker Box bounce repeatedly after player opened the Shulker Box.

Excepted Results:

Items above Shulker Box shouldn't bounce.