Not sure why that happens I just tried to zap you too and it failed. Maybe you have too much sats on that wallet probably some limit there.
It seems to fail when the zapping wallet doesn't wait more than a couple of seconds for the server to reply with an invoice. I don't run a node on AWS like all the pro-centralization folks on centralized LN hosted wallets. I see every attempted zap in logs, just the zapper quits before paying the invoice.