Is a 3 sat fee normal when sending 21 sats zap from Nostr via nostr:npub1xnf02f60r9v0e5kty33a404dm79zr7z2eepyrk5gsq3m7pwvsz2sazlpr5?

I didn’t have this when using it via nostr:npub1hcwcj72tlyk7thtyc8nq763vwrq5p2avnyeyrrlwxrzuvdl7j3usj4h9rq?

Is this the price of self custody? 🤔