Thanks for pointing this out.
You’re probably running the screen saver without enabling the option to show the log on screen when it deactivates. We really, really, recommend users to enable this option so that it requires a password when the screen saver is deactivated.
However, we’ll make sure AxCrypt signs out even in this case. You can follow the issue here: https://bitbucket.org/axantum/axcrypt-net/issues/171/sign-out-of-axcrypt-even-if-no-password-is .