Dashlane password manager screws up bill payments in Safari with my online banking by replacing the BPay customer reference number with the bank account’s username. But it does this AFTER I hit the
‘confirm” button to finalise the transaction. The next screen shows the reference number field as being in error.
Part of the new macOS means SMS codes received to confirm payment can be pasted directly in the confirm field of the final confirmation window on the payment website. I don’t have the Dashlane problem with other browsers but they don’t offer the SMS auto-copy/manual paste either.
The SMS code also applies to iCloud in Sfari - log in & the security code sent to the mobile gets into Safari via the magic of Continuity.