I don’t know if changes on Home Assistant or in SmartIR but this configuration used to work for controlling climate with Broadlink RM Mini 4, last time I set my configuration, one year ago.
Smartir
Home Assistant docker image
https://hub.docker.com/layers/homeassistant/home-assistant/stable/images/sha256-3f8332045cc134cecb82ebe6d4f268f13c0a4f40af53050da18c88f58267144e?context=explore