I just set up a test page and the plugin does seem to work on my computer at least. I am using Safari on a Mac. Maybe it is a browser or device specific issue?

Editor: testApp42wCleanDB | Bubble Editor
Preview: https://testapp42wcleandb.bubbleapps.io/version-test/plugin_detect_inactivity?debug_mode=true

This is the plugin I am using: Detect Inactivity Plugin | Bubble

Does that help? :blush: