@Hebe Vollmaus: Wow!! Very useful answer!!! Thank you very much Sir!!!!!!
I didn't create a new thread, because I don't want to pollute the forum with many new threads with my questions.It does not deserve it.
Else, I mean that when the game is paused, you can't do any actions on periscope, map, crew, torpedoes settings, etc etc..........
About sound bug, for example after pause, you can hear the splash sound of the bow inside the command room while you are stopped and underwater......this bug appears with Wise submarine modd. But there are also a bug with vanilla after pause: you can't hear anymore your diesel engines while travelling on surface...
PS: Sorry for my bad english.....