A player placed a shulkerbox on the end obsidian platform.
Coreprotect deteced that, but it did not log how it got removed by another player coming trough. So no command can possible get it back to a state where it was placed there since there is no entry in the database that removed it that could be undone.
It correctly detected #portal placed obsidian during that but not it should also say #portal placed air or smt for the cube above that gets cleared.

Using CoreProtect v19.5 on paper 1.16.5