Question: What should a User Equipment (UE) do when it receives a paging message with access type set to non-3GPP access while in 5GMM-CONNECTED mode over non-3GPP access?
Option 1: The UE shall respond to the paging message and attempt to establish a connection.
Option 2: The UE shall ignore the paging message but continue to monitor for further messages.
Option 3: The UE shall not respond to the paging message and take no further action.
Option 4: The UE shall send an error message back to the network indicating that it is already connected.
Explanation: According to the specified abnormal case, when a UE receives a paging message with access type set to non-3GPP access while in 5GMM-CONNECTED mode over non-3GPP access, it shall not respond to the paging message. This is because the UE is already connected and there is no need for it to take any further action.