This is an issue which I haven’t encountered before and I’ll have to further look into it to give you an answer. I’ve opened a new issue on github to track the progress.
Could you test if the Philips TV Remote Control Android app works for you?
This app uses the same communication protocol as the Homey app and if it works we should be able to get the Homey app working. If you don’t have an Android phone you could test it via an Android emulator, because I don’t think there’s a version for iPhone.
