Some evidence in the wild...
Try naming the shulker with a custom name with an anvil. Then retry.
Same issue on realms. Lag spike even when opening empty inventory. We have iOS PE, Xbox, and Windows 10 bedrock players.
Same issue on our bedrock realm. Opening an inventory, even an empty one, causes a massive lag spike.
Same or similar issue on our current and last realm. Randomly some chunks just don't load in . It's as if the structures i.e. the ground etc are there, but no textures at all, everything is just transparent. Players can also see into the underground areas of the chunks neighbouring those that are not loading. They can see tunnels and empty areas. This is a new realm as we had to restart and lose months and months of work because of the same issue in the last realm - the game just becomes unplayable.
We've tried eveything from console reboots, restores from backup, making sure nothing that ticks (redstone or hoppers) is built within the same chunk or within at least 120 blocks. Builds that contain ticks are kept within as few a chunks as possible and don't cross over into other chunks where avoidable.
Main users are Xbox One, some PE players.
Can I just say that that this is really frustrating from what is a paid for service.
Thanks
[media]This happens on Xbox One Bedrock edition in our online realm.
We even placed a water pool and nether portal at the highest height at the main spawn point because of the frequency.
To add to the report - this happens in the above circumstances even if the game was saved at a place away from main spawn point.
Same issue in our realm post v1.12.0 update. We are having to keep a player online in the realm 24/7 to avoid losing any saved work or progress. Backups no longer work and the same 0.0mb issues occurs. We have players on Xbox One, Windows 10, and PE.