Client is quiet after loaded level after join session

Hi,

I started a new client-server project and am experiencing an strange issue.
My client join a session, load the game level ,but after that it is quiet.

That is, no matter Level Blueprint, PlayerController BeginPlay or Tick event, nothing is called.

My server is a listen server and GameMode’s OnPostLogin is called when client login.
I checked my client’s log, it load the same level which server is listening and then paused.

What did I miss?

I do the same thing in 4.13.2 and it works OK, but now I do it in 4.17.2 things gone different.