3120703 - PO SFTP adapter authentication request from server could not be processed

• In Process Integration (PI) or Process Orchestration (PO) SFTP Adapter has been updated to SP05.43 or higher
• After this, integrations using either the Sender or Receiver SFTP Adapter start to fail with error similar to below: 
  Catching java.lang.UnsupportedOperationException: received authentication request from server which could not be processed: destination=xxx@<sftp_server>; name=Password authentication; instruction=prompt=xxx password
• If you enable trace location using 3103573 - How to capture a Debug level trace for the PI/PO SFTP Adapter and 1514898 - Troubleshooting SAP Process Orchestration / Integration and collect the traces you will see an error similar to below: 
  SSH_MSG_NEWKEYS sent
  SSH_MSG_NEWKEYS received
  SSH_MSG_SERVICE_REQUEST sent
  SSH_MSG_SERVICE_ACCEPT received
  Authentications that can continue: keyboard-interactive,password
  Next authentication method: keyboard-interactive
  Disconnecting from <sftp_server> port 22
  ~p.ra.rar.jca.SFTP2XI.sftpConnection Catching java.lang.UnsupportedOperationException: received authentication request from server which could not be processed: destination=xxx@<sftp_server>; name=Password authentication; instruction=prompt=xxx password
  at com.sap.aii.adapter.sftp.ra.rar.integration.sftp.SSHConnection$MyUserInfo.promptKeyboardInteractive(SSHConnection.java:419)
  at com.jcraft.jsch.UserAuthKeyboardInteractive.start(UserAuthKeyboardInteractive.java:171)
  at com.jcraft.jsch.Session.connect(Session.java:468)
  at com.sap.aii.adapter.sftp.ra.rar.integration.sftp.SSHConnection.<init>(SSHConnection.java:156)
  at com.sap.aii.adapter.sftp.ra.rar.jca.SFTP2XI.getConnection(SFTP2XI.java:149)
  at com.sap.aii.adapter.sftp.ra.rar.jca.SFTP2XI.sftpConnection(SFTP2XI.java:326)
  at com.sap.aii.adapter.sftp.ra.rar.jca.SFTP2XI.invoke(SFTP2XI.java:942)
  at com.sap.aii.af.lib.scheduler.JobBroker$Worker.run(JobBroker.java:529)
  at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)
  at java.security.AccessController.doPrivileged(Native Method)
  at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:185)
  at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:302)
  Exception received: java.lang.UnsupportedOperationException: received authentication request from server which could not be processed: destination=xxx@<sftp_server> ; name=Password authentication; instruction=prompt=xxx password 

• SAP NetWeaver 7.5
• SAP Process Integration, secure connectivity add-on - SP05.43 or higher

connection stuck, blocked, customPreferredAuthentication , KBA , BC-XI-CON-SFT , Secure File Transfer Protocol Adapter , Problem