withSignedTransaction: This option has been added to SignerOptions. When using signAndSend, signAsync, and dryRun you may now enable or disable the use of the signedTransaction field by adding the withSignedTransaction option. When withSignedTransaction is not enabled but the signer adds a signedTransaction the api will error.
Wallets (Subwallet or Talisman) say this when trying to sign with the new ledger app:
This is due to https://github.com/polkadot-js/api/releases/tag/v12.0.2