Bip39 Vs Slip39. Due to the cryptographic layout of BIP-39, a weak passphrase would not lessen the security of one other wallets or aid expose the seed words. Entropy is an advanced function. Your mnemonic could be insecure if this feature is applied improperly. Go through more Though BIP39 seed https://webcastlist.com/story20775816/bip39-words-https-linktr-ee-bip39-a-review-of-bip39-generator