Laravel auth::check return false but session exists

Many times a day Auth::check()return false.

The session is stored in redis and it exists and is not expired. Why Auth::check() should return false?

This happen many times a day for all users in the same time. ex: at 2PM all users has been logged out... at 4:38PM again, and so on.

We have laravel 5.8 and redis to store the sessions. Our app is running on a docker container

via Chebli Mohamed