Bank and Bank Branch details are coming back as null when fetched using externalBankAccounts RESTApi

I have encountered an issue when trying to fetch employee bank accounts using the REST API. The bank and bank branch details are coming back as null in the response. Here is the REST API endpoint I am using:

{fusionURL}/fscmRestApi/resources/11.13.18.05/externalBankAccounts/{externalBankAccountID}

These bank accounts were created through Employee Self-Service (ESS) and REST API.

Interestingly, when I created these bank accounts using the REST API, the response showed that the bank and bank branch details were populated correctly. However, when trying to fetch the same bank accounts using the same API, those details are now coming back as null.