Behavior Change
Previous Behavior: SMF queued the Router Advertisement (RA) and Router Solicitation (RS) messages when the PCF-initiated PDU Modification Request is triggered immediately after the Session Create Request.
New Behavior: The SMF sends the RA message and also responds to the RS message when the PCF-initiated PDU Modification Request is triggered immediately after the Session Create Request. That is, the SMF prioritizes the processing of RA and RS messages over the PCF-initiated PDU Modification Request.