[1.17.1] Placed structure is visible after reopening the world.

[RInventor7]

I have my structure in .nbt format. When I click with my custom item on the ground it should place the structure. However, it only places one block from the bottom corner of the structure. When I try to walk, the player moves very slowly, like the wall structure is there. For some reason it's just not visible. After reopening the world, the structure is visible. My code: 

if (world instanceof ServerLevel _serverworld) {
	StructureTemplate template = _serverworld.getStructureManager().getOrCreate(new ResourceLocation(MyMod.MOD_ID, name));
  	if (template != null) {
    	template.placeInWorld(_serverworld, new BlockPos((int) x, (int) y, (int) z), new BlockPos((int) x, (int) y, (int) z),
           	new StructurePlaceSettings().setRotation(Rotation.NONE).setMirror(Mirror.NONE).setIgnoreEntities(true), _serverworld.random, 3);
  	}
}

How make the structure visible right after placing? Or am I doing something wrong? Thanks in advance!

Edited January 25, 2022 by RInventor7