Chunks disapear

I wrote some code for a free camera movement without a player. The voxel-engine code states that if there is no player voxel.js will take the position of the camera to find chunks that are far away and remove them.
So far everything is working fine BUT the chunks won't load when the camera gets close to them again. I tried to force voxel.js to show them but that won't work too.
cp = game.camera.position.toArray();
var chunkX = Math.floor(cp[0]/32);
var chunkY = Math.floor(cp[1]/32);
var chunkZ = Math.floor(cp[2]/32);

console.debug("Update Map around: " + [chunkX, chunkY, chunkZ].toString());

game.showChunk(game.getChunkAtPosition([chunkX, chunkY, chunkZ]));
game.showChunk(game.getChunkAtPosition([chunkX + 1, chunkY, chunkZ]));
game.showChunk(game.getChunkAtPosition([chunkX + 1, chunkY , chunkZ - 1]));
game.showChunk(game.getChunkAtPosition([chunkX, chunkY, chunkZ -1]));
game.showChunk(game.getChunkAtPosition([chunkX + 1, chunkY, chunkZ + 1]));
game.showChunk(game.getChunkAtPosition([chunkX -1, chunkY, chunkZ - 1]));
game.showChunk(game.getChunkAtPosition([chunkX -1, chunkY, chunkZ]));
game.showChunk(game.getChunkAtPosition([chunkX -1, chunkY, chunkZ + 1]));
game.showChunk(game.getChunkAtPosition([chunkX, chunkY, chunkZ + 1]));

I used game.setBlock([msg["x"],1 ,msg["y"]], c) to create the blocks. Is this the right way or will it just display the blocks until the chunk is hidden the first time?

Start by tracing the chunk removal and reload behavior around game.getChunkAtPosition(), game.showChunk(), and game.setBlock(). Reproduce the issue by moving the camera away and back, then verify that previously removed chunks reappear and blocks created with setBlock persist.