I don’t know if this is a known issue or not but the classic UI using HabDroid hasn’t been updating icons (on/off, percentage based) since going OH2. It works when using Chrome and ClassicUI.
I assume you mean the Android app and not the Classic UI? If so, it is a known problem: https://github.com/openhab/openhab.android/issues/145
I do mean that, sorry for not being clear and not finding the bug on my own. Well then, I’ll watch that issue until I can switch over and try Rotini with OH2 at least