If i create a world of the "debug" variety, I can go into creative to allow myself to place blocks (which doesn't work, as expected because of the debug mode) then I give myself a mob spawner using "/give @p minecraft:mob_spawner" and all is fine and dandy. but when i got to place it on a solid block, like wood, it places then gets broken due to the debug mode. However, the particle effects from the spawner continues to be generated and more blocks can be placed in that same spot.