Since about September 1, 2022, @up.edu.ph mail users have experienced frequent and abrupt automatic logout from their GMail. Some of us have complained that this might be a security issue and causes inconvenience on the part of the users.
We found out from the UP System IT that the automatic logout within 24 hours is a new security feature of Google for GMail. In response to the users' reports, the IT Team increased the limit from 24 hours to 7 days. Note that there are no other options to make the limit less than 7 days.