Why do I get signed out all the time?

Hello all, I was quickly just wondering if it's normal for me to be logged out very often out of wayfarer. Everytime I close the page, or refresh it after around 15 minutes from logging in I have to sign in once again, and it's getting really annoying. I was wondering if there is a setting to this that I have missed or if it's a bug, or if this occurs for everyone. Thanks.
Answers
Yes, this is normal. Also, if you login on a different browser (such as if you decide to do some reviews on your computer instead of your smartphone), that will instantly log you out of your previous session.