The most likely cause of content being overwritten in an Event is that you were likely working with multiple tabs open. Working with multiple tabs open is not recommended because the system only knows the last activity you saved, not the tab of the browser you are working in. This can cause content to be overwritten with incorrect information.
It is always recommended that when working with multiple tabs open to make sure that the tab on which you are saving changes is the tab that has had the most recent activity. This can be done by refreshing the page before making any modifications, or clicking on the menu button/link on the page the bring up the area you are currently working in. The best practice is to work in a single tab, which is common for most SaaS applications. If a workflow requires using multiple tabs or windows, we suggest using different browsers at the same time.