After user authenticated, they are disconnected after approximately 10 minutes of inactivity, and they should login again in order to have access on the network.
Check that the client can open the portal page for authentication, and the mobile terminal is normal. Then the laptop terminal will have this problem.
Customer used the notebook for authentication, and after the authentication was successful, the portal page was closed.
Since the browser heartbeat needs to be maintained after the browser is authenticated, the heartbeat is lost due to the heartbeat timeout.
Change the heartbeat timeout configuration to one day, so that the browser is closed after the laptop authentication succeeds, and will not be dropped due to the portal heartbeat timeout.