When applying a backlog filter by team, the UI presents "Suggested Teams" in the dropdown, and the UI tip when you click on the ? icon states that the suggested teams list is populated by the teams that appear in the project. That list is still limited in choices, it can show a max of 50, where we may have 60 teams on a project. Often certain teams seem to never have thier own team name appear because of this, and have to type thiers in every time. Perhaps the suggested teams list can be biased to show teams you are a member of, if they are in the current project.