Automatic tnt igniting when placed

I want to make a custom tnt item,which when you try to place it in ground,it will be ignited automatically and then it will explode like a normal tnt,but I have problems though.

Firstly,if I try to place a normal tnt or the automatic tnt I made in the air,an ignited tnt is being spawned.

Secondly, if I place again those tnts in ground,it seems that a non ignited tnt is placed and then after some blocks away,an ignited tnt is being spawned and it blows up the with the other tnt.

The result I ought to expect,would be after placing the tnt with custom name,(automatic tnt),I should have seen the tnt I just placed being ignited etc. but it didn't happen exactly.

PHP:

    /**
     * @param BlockPlaceEvent $event
     */
    public function onPlace(BlockPlaceEvent $event) {
        $player = $event->getPlayer();

        $block = $event->getBlock();
        $item = $event->getItem();
        $hand = $player->getInventory()->getItemInHand();
        if($hand->getName() === "§l§6Automatic §eTNT" and $hand->getId() === Block::TNT) {
            $block->ignite();
            $hand->pop();
            $player->getInventory()->setItemInHand($hand);
            $block->getLevel()->setBlock($block, Block::get(Block::AIR));
        }
     }

I may did some mistakes when checking the custom tnt placing,but I couldn't find anything helpful enough on google.I just want someone to help me if it's possible.

 

I tried to make also some different checks and add different codes to make those tnts work but I got same results.

 

You need to make a « new tnt » and extend the real tnt