Bip39 Checksum. Thanks to the cryptographic design of BIP-39, a weak passphrase does not reduce the security of the other wallets or help reveal the seed words. Certainly, BIP39 passphrases are case-sensitive. Ensure that you enter your passphrase particularly when you established it up, including any uppercase or lowercase letters. https://bookmarkshq.com/story21213783/bip-39-https-linktr-ee-bip39-5-essential-elements-for-bip-39