Apple Music explicit content on child’s restricted account

My 8 year old has restricted access on Apple Music under Family Sharing and Screen Limit and content restriction settings.

Extremely explicit context (Jimmy Carr and Frankie Boyle) is still being suggested to him and he is being allowed to play that content.

I have checked the settings on both my account and his iPad and they are the same (see attached photo).

Despite explaining why it’s not suitable for children, he keeps playing it and I’ve had to turn off his access to Apple Music. Is this an Apple Music issue (I’ve read it previous complaints about the same thing) or am I missing something obvious?

Thanks