Zwift Fondo Series rides not filtered correctly

In the companion app, using the Fondo filter does not show the Zwift Fondo Series rides. The only events listed when only the Fondo filter is selected are team TT races (because there is inexplicably and annoyingly no way to filter those out).

What is the point of the Fondo filter? Is there some kind of event I have never encountered that fits this filter?

Maybe these series rides are miscategorized?