This mnemonic represents a seed via 11 words. Each word is unique and contains some bits of entropy. The final and 12th word is a checksum, which BIP39 uses for error checking. In this case, abandon is the first word in the word list, representing 0 bytes, so this is essentially a seed comprised of 0 bits.
with the same mnemonic will yield the same Wallet object.
If you’d like to generate a random wallet, you should call:
const generationResult = Wallet.generateRandomWallet()
const newWallet = generationResult.wallet // A new wallet object
const mnemonic = generationResult.mnemonic // A randomly generated mnemonic
const derivationPath = generationResult.derivationPath // The derivation path used to generate the random wallet.
Under the hood, this function is implemented here: