Because of the check in code `wordList.count.isMultiple(of: 4)` here https://github.com/matter-labs/web3swift/blob/a4e4985c9ef97892ba56d78e9249f2485b262d1b/Sources/web3swift/KeystoreManager/BIP39.swift#L117 it does not work. It should be multiple of 3.