For your protection, your session ends automatically after one hour of inactivity (no requests from your account during that time), and you're asked to log in again (including two-factor verification) — this applies even if you enabled "Remember Me" at login.
"Remember Me" at login doesn't override the idle timeout above; instead, it extends how long your browser stays "remembered" after being fully closed to 30 days, instead of expiring the moment the browser closes. In other words: as long as you're actively using the platform, your session stays open without interruption; but if you close the browser and come back within 30 days (with "Remember Me" enabled), you won't need to log in again.