When pushing a block to a shulker, shulker should be pushed too. But the bug makes that shulker stays at the same place and now since the block is pushed, the shulker stuck inside of the block.
MCPE-19333
Shulker stuck in blocks
Resolved
Duplicate
0
Duplicate of MCPE-18338. It would be helpful if you attached the screenshots in this report to to the other one, as they are good for explaining the issue. 🙂