How do I mute this user? He is muted, but he still appears. I can't stand politics or media, and I come to Nostr to avoid these themes, so I'd like to think that 'mute' means 'mute'. I have muted him, so now it offers me the choice to unmute him, but he still appears in my feed. WHY? Does anyone know? I love the mute button, so I want to know that it works.