Thank you for keeping us updated, 193514534020.

If this behaviour is only affecting the transactions you mentioned, we can temporarily use the workaround of creating the correct entry while excluding the bank transaction.

If the issue of being unable to change the exchange rate persists, we recommend reaching out to our Live Support Team. They can investigate further and perform additional troubleshooting to identify the root cause of the behaviour.

We're here if you have any other questions or need further assistance.