[ThatPlayer]

Similar problem here. I've thought of getting IR receivers to also listen for the remote's IR signal, since you have to be able to encode the IR protocol anyways. But even then sometimes the AC unit doesn't get the signal from my remote, so I'm unsure if that's a remote issue or receiver issue.

The completely overkill setup would be to get a different remote control, get my DIY receiver to accept that and convert it to my AC unit's IR code, updating HA while at it. The remote's state would be out of sync still, but it'll keep the units in sync with HA.