Why can't I stay signed in on ATT U-verse app?

The latest update to the ATT U-verse app on my iPad has caused a persistent issue where I am unable to stay signed in. Despite checking the "KEEP ME SIGNED IN" option, I am frequently prompted to sign in every time I want to view the guide. Is there a solution to this problem? Is there any ongoing effort to fix it? This inconvenience is particularly frustrating as I frequently check the guide multiple times a day.