Why is it that the U-verse app can't remember my password for more than a few days?

The title says it all! Every few days I go to use the U-verse app to check my recording schedule, and the lame app requires me to log in once again. This happens on my Android devices. Not sure if the issue happens on Apple products. I try to have very secure passwords for all my login information, but I am so sick of having to type in a long, convoluted password because the U-verse app constantly likes to log me out.  This is the reason people end up using simple passwords.

I don't need suggestions about using a password manager on my phone or tablet to make login easier. This is a dumb TV app, nothing more. The high security is a little over the top. Even my banking app doesn't log me out. It just requires me to remember a simple pattern. I keep my phone locked, so I don't need Fort Knox security for my TV app.