The bug
1.21 pre-release 1 finally fixed MC-902 by making the replaced blocks drop as items rather than outright deleted as previously. However, this behaviour does not apply to blocks placed within or around the exit end portal when the dragon is killed or resummoned.
The other kind of end portal is also affected, which is reported under MC-227097.
How to reproduce
Enter the End
Place your precious shulker boxes inside the end fountain
Kill the dragon
Expected results
As the end portal activates, the blocks replaced by the end portal would be dropped as items and would be sent through the portal.
Actual results
Your items are now gone forever. Well done!
Further notes
Also happens when the portal deactivates during the summoning ritual.
Linked issues
relates to
Attachments
Comments


Confirmed in 1.21.3

this doesn't seem to be fixed in 25w02a snapshot

Seems not fixed in 25w02a. EndPodiumFeature.java didn't receive changes like it was for EndPlatformFeature.java for MC-902 (namely, calling destroyBlock before setBlock). Also confirmed to be not fixed in game.

Still doesnt drop blocks when summoning new dragon.
Can confirm.