The Bug:
Any blocks including indestructible blocks can be destroyed near the end crystal when you resummon the ender dragon.
How to Reproduce:
Go to the end and kill the ender dragon
Place any blocks next to the end crystals
Resummon the ender dragon by placing 4 end crystals in the center
When the ender dragon is being resummoned, the end crystals will make explosions sounds and destroy any block in the game.
Linked issues
Comments

Thank you for your report!
We're tracking this issue in MC-108605, so this ticket is being resolved and linked as a duplicate.
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Duplicate of MC-108605.