I tried on multiple occasions to pay my rent using Zelle. Every time except one, the transactions failed with a "cancelled by recipient" or "cancelled by recipi

I tried on multiple occasions to pay my rent using Zelle. Every time except one, the transactions failed with a "cancelled by recipient" or "cancelled by recipient's bank" message. My landlord verified that neither he nor his bank ever cancelled any of the payments, and I haven't bothered with Zelle since. How can a payment system that a) misrepresents basic transaction history, and b) alters time-sensitive, in-process payments based on that misrepresentation, be trusted?