The Happy Ghast starts to lag when you tie it up and leave it and the game takes a while to react.

Well, I was tying up my Happy Ghast very happy, but seconds later the game, when breaking blocks, took a long time to execute the action because you know that when you break a block, the block falls to the ground quickly after being broken, and that's what happened with all the chests, they take a long time to open and so does the inventory.