There’s usually an error message but not this time. Zap seems to work initially but it’s no longer there when I revisit the note. 
Discussion
Maybe it’s a receipt/relay issue. Sats have left my wallet. 
yeah,
there are so many moving parts in zaps (two wallets, zap service, nostr relays, clients, different nostr events) that this is often hard to debug and actually often fragile.
if the payment works it is independent of the wallet I think.
I see the zaps on amethyst now too. Just took a while to propagate I guess.