@User1746542272069651133
Welcome to the LastPass Community!
When LastPass logs you out at the moment you close your browser but no feature on our end is triggering this, this could be due to settings on the browser itself. On Chrome, it could be set to clear browsing data on Close. This article from Google, shows how to enable it, so you can use it to disable it as well.
Thank you very much, I will try this out.