Homey App becomes inoperable on iOS

Approximately once a day the Homey App becomes inoperable. It looks like it is working, but you get no action when you press device buttons, or if you try and change the AC temp. for example

Could it be that Homey cannot reach your AC? I’ve seen this happen on my hue lights sometimes or when changing temps. It may be that a response from the device takes too long. When I restart the app, it checks the device states. The correct temp or light state is always set, but not displayed. You experience this too?

Yes, exactly, It looks like it is setting the temp but then the display goes back to what it was before. However, after closing the App and re-opening it you see that it had actually chnaged the temp setting and now displayed that correctly. Must be a bug in the App/