Family members using a kids profile receive no search results when searching for artists which fall under child protection restrictions (e.g. the band Korn). However, in the proposal section (Favorites > Artists > + Add artist) there are no restrictions whatsoever and  proposed artists can be added to favorites from there. Once any of the “restricted” artists have been added to favorites the algorithm does the rest and more “restricted” artists are proposed. Songs with explicit lyrics can be played and the lyrics can be displayed.

Also, Google Assistant can be used to bypass restricted search terms. E.g. ask Google Assistant to “play Korn in Deezer” on a kids phone running Google Family Link and a kids profile of Deezer. 

This is a major design flaw in child protection and must be fixed immediately.