One of our demo apps has all of a sudden started logging me out in the middle of taking some action (clicking on a form or microflow etc). This is NOT related to security and was not happening before (and the demo wasn't modified). Please advise.
Did you open multiple applications, or the same application multiple times, in the same browser? You should have only one application running on localhost open at the same time in the same browser. Otherwise the apps will 'steal' each other session information, causing the logout.