"detail": "No order for ID 226165665486, problem: urn:ietf:params:acme:error:malformed"
This potentially looks like an instance of "the 404 bug", where boulder sometimes returns a 404 if it queries a replica that is a bit behind. This is a long-standing issue with Let's Encrypt and can cause spurious errors. Retrying usually fixes it, as it happens randomly depending on what database replica gets used.