Showing zaps is still implemented differently across Nostr apps. Even though the payment went through you don't have the visual feedback on UI unfortunately.
I had two error 500 messages the rest looked like they went through but no zap sent and a couple just kind of kept trying to process. nostr:npub1f6ugxyxkknket3kkdgu4k0fu74vmshawermkj8d06sz6jts9t4kslazcka said the rest just had a delay getting into her wallet.
Discussion
Okay no worries it's just one of those things