Several times I have been working on entering data within PPO, e.g. a business case or PID while multi tasking - perhaps cross-referencing across other documents etc.
Then when I come to hit submit, I get the dreaded SSO prompt and the changes I have made are likely to have been lost.
In other systems e.g. Workday we get a big timer appear on the screen, changes the colour, to signal to the user to take action.