RuniverseLand.mintTokenId uses _mint instead of _safeMint to mint NFTs. Therefore, no callback will be performed for smart contracts and it is not checked if a smart contract can handle NFTs. This should not be a huge security problem, because this function is usually called when a user / contract explicitly requests that a token is minted (and pays for it). It would be very stupid (and a user error) to do this from a contract where the NFT is afterwards not retrievable. However, the private sale minting is a bit different because this is done by the owner to a list of given addresses. I do not know how this list is created, but there it could potentially happen that a user accidentally provided a smart contract (e.g., a smart contract wallet) and did not think about this. So you might want to consider using _safeMint instead.
