It's same with many online platforms as a login session has limited time, beyond that the platform will log user account out for security reason. It's only not known yet like how long a login session will remain before an automatic logout is triggered.
Is it 24 hours or longer or shorter than 24 hours?
It would be helpful for Lootbox users if the team can share this information.
The last time that I access the site was slightly 2 days ago which will be the reason my account was logged out of the site. There are some sites that I can stay longer than that, although it is not a problem because I can easily login on lootbox.com which is what that is very important. Easy captcha solved on mobile but no captcha required on desktop. I tried it within few minutes, I close the browser, my account on the site was not logged out which is good.
In my opinion, the fact that Lootbox logs you out after your session has been inactive for several hours is a very good thing. This protects you from having your account compromised in the event of loss or theft of your phone or laptop. After all, this is an account that could hold money – services like banks log you out immediately, not after several hours.
It would be problematic if it logged you out during a session, but if it happens several hours later, it's actually a sign that it's working properly.