Solved Chests are sometimes invisible setBlockIdAt

I wrote a plugin which sets blocks. Anything works, it sets grass-blocks, glas-blocks and so on, except chests. The Chests are sometimes invisible. And if I reload the map, all chest are invisible.
I tried to set the chests with this code:

PHP:

$sender->getLevel()->setBlockIdAt($x, $y, $z, $id);
$sender->getLevel()->setBlockDataAt($x, $y, $z, $Extraid);

and with this code:

PHP:

$block = new Chest();
$sender->getLevel()->setBlock(new Vector3($XKiste, $YKiste, $ZKiste), $block, true, true);

Your german X, y, z Kiste is nice

I think it is a Pocketmine bug

Okay thanks!

You have to initialize a chest tile object. MCPE wouldn't render the chest model until there is a tile entity at that position.
Look at the the pocketmine\block\Chest:lace() method for how to place a chest.

No, you are wrong. Please, don't accuse PocketMine as having bugs when it is behaving absolutely correctly and you are using it incorrectly.

How does place() works? Which parameters I need?

No, I asked you to look at it, not to call it.
https://github.com/PocketMine/PocketMine-MP/blob/master/src/pocketmine/block/Chest.php#L99
After setting the block to chest, you still have to create a tile for it.

Like this ?

Code:

$block = new Chest();
                $sender->getLevel()->setBlock(new Vector3($XKiste, $YKiste, $ZKiste), $block, true, true);
                $nbt = new CompoundTag("", [
                    new ListTag("Items", []),
                    new StringTag("id", Tile::CHEST),
                    new IntTag("x", $XKiste),
                    new IntTag("y", $YKiste),
                    new IntTag("z", $ZKiste)
                ]);
                $nbt->Items->setTagType(NBT::TAG_Compound);
                $tile = Tile::createTile("Chest", $sender->getLevel()->getChunk($XKiste >> 4, $ZKiste >> 4), $nbt);

Thanks, it works. <3