When using Starred Filters, end uses can create their own filter and save the selection for repeat use. However, any Starred Filter created will be visible to all users regardless of their Group or Parameter assignment. This is because these items are stored in the Data Browser as additional elements linked only to the data source and not to a user or group.
As a result, this causes confusion, lack of control where one end users Starred Filters can be removed by another and concerns about data security. Appreciate utilising multitenancy would be a solution, however, this is not possible in all circumstances and requires a significant amount of additional administration.
I am recommending a functionality change to control / limit the visibility of Starred Filters to the User or Group that created them.