Having to sign in every other day is beyond annoying.
As the adage goes, "If it aint broke, don't fix it". Well you went and fixed something that wasn't broken and broke it. I'm tired of having to sign in every time I turn around.
1232nd
ranked

Hi there. Staying signed in to your Yahoo account allows for quick, convenient access to all your favorite Yahoo services. Your account’s default setting is set to “Keep me signed in” for 2 weeks, unless you sign out. However, there are some circumstances when you’ll be prompted to sign in again.
Issues with your cookies can sign you out, more details here: https://help.yahoo.com/kb/sign-signed-selected-sln2660.html