I’ve had this issue on both iOS and Android for quite a while.
If I have a switch in a room in the app and I press the toggle state button the actual physical switch turns on instantly but the app then animates a line around the toggle state button for a very long time. Eventually, the animation finishes and sometimes the switch will be visibly indicated as being on, other times not. For those times where the physical switch is on, but the app view for the room indicates it is off selecting that switch in the room and going into the details view DOES show the correct state of the switch.
This happens whether it’s a Z-Wave switch, a Lifewave RF light switch or a Hue light, the page for each room just doesn’t correctly reflect the state when you make changes within it.
I’ve uninstalled the app and reinstalled it on both iOS and Android but this hasn’t made any difference.