My zaps work because they go to a cashu mint operator who does a pretty good job of maintaining their lightning node. This screenshot was from trying to zap someone else. Probably 20-25% of my zaps fail this way.
Very small amounts are often tricky to make in a self custodial way :/
Bigger ones should work just fine though. I can highly recommend @Phoenix Wallet .. can’t remember when I last had a failed payment with them.