Rise 360 Server Connection Timed Out: Lost Work
Quote from Articulate Support:
After careful investigation... I would recommend not leaving your Rise 360 course idle for long periods of time to avoid the risk of changes not being saved or a possible corruption to the course. ...refresh your browser before making any further changes to make sure you don't overwrite anything that has been done by the other collaborator(s).
I'll be closing this case [#02946735], but we'll continue to monitor these kinds of reports to further narrow down the cause and be able to come up with a fix or solution.