I'm able to query the zaps on that note with nostr-tools. I only found one zap on it. Here's an example:

https://codesandbox.io/p/sandbox/nostr-zaps-query-example-8zds4c

I think you're probably structuring the query so that the relay looks for zap receipts with the id f49c4364445f1c780b8fecae595a7d4ba390df66dceaeaad063c0f235103f155 and not for zap receipts with an e tag that matches f49c4364445f1c780b8fecae595a7d4ba390df66dceaeaad063c0f235103f155. 

 It ended up just being a relay thing

Thanks for recommending Nostr.Band as that’s the most reliable one for me now

This program is about to be so sick! Pumped for you and @The Fishcake🐶🐾 to see it 👊