I keep getting logged out

This problem is on my iPhone 4s, and it’s been happening for two or three days. Every time I come back to COTH I have to log in. Each time I login, I check the “remember me” box. Up until this problem started, I was always logged in when I would open COTH.

Could be a new iPhone issue, since I just updated my operating system with what I believe was a bug fix. Or a bug creator! Depends on your perspective. Anyone else having this problem?