Recent DKIM record format change?

In late May 2021 we setup a new account which was using 3rd-party DNS. We added the DKIM TXT records to the 3rd-party DNS and everything worked as expected. Today the same account is showing a warning for DKIM on 'Email Deliverability'. Checking the public DKIM TXT record in cPanel it's now showing a longer record than the record added in May 2021. Has cPanel changed the format of the DKIM TXT record to a longer public key? I searched but could not find any details. Thanks.