MacBook restarts when idle

MacBook Pro 2019 13" If I don't use the laptop, it goes into sleep mode about 5-10 minutes. When I want to continue working I press any key and I am greeted with a login window, after which I find out that all applications are closed as if a reboot has occurred.

If I work on it and do not allow inactivity for more than 5-10-15 minutes, I do not know the exact duration, everything is OK.

Maybe I incorrectly set some operating system settings or the system restarts one of the applications, But how do I find out?

Solution 1:

Answer: https://support.apple.com/guide/mac-help/set-your-mac-to-log-out-when-not-in-use-mchlp2443/mac

On your Mac, choose Apple menu > System Preferences, click Security & Privacy, then click General.

Click the lock icon to unlock it, then enter an administrator name and password.

Click Advanced. Select “Log out after... minutes of inactivity.” Set the amount of time before the user is automatically logged out.

@lhf Thanks!