There are several known browser extensions that interfere with functionality within ShowingTime. We have seen this happen in Chrome and Firefox.
For example, if a user has the Honey, Grammarly or Last Pass browser extensions enabled, when they go to click on the ShowingCart to view or modify a ShowingCart, the screen will flash and it redirects them to the Make New Request page instead.
ShowingTime is aware of the issue. The work around is to disable or uninstall the extension.