Hi @ANSOUIS, As this has been brought up many times, in the wishlist category, there is a community request to have this disabled that you may wish to contribute to:
https://forums.flightsimulator.com/t/logbook-should-not-pop-up-in-the-middle-of-the-shutdown-procedure/178798
As @Goffiik noted, currently there isn’t a way to disable this.